Some of the ideas discussed in this blog are published in my book called "The Bluestone Enigma" -- available by post and through good bookshops everywhere. Bad bookshops might not have it....
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Sunday, 25 June 2017

Striations in the Stockholm Archipelago

Not all rock surfaces are susceptible to the process of scratching or striation.  In this part of the archipelago this grey fine-grained gneiss (?) reveals crossing fractures and a smoothed striated surface.  The pink granite (?) in the background contains large masses of quartz crystals, and reveals no striations at all, breaking up into a broken and rough surface.  In the foreground is a scar left by the removal of a large bedrock block on the down-glacier or lee side of this slight ridge.

Another heavily striated surface on fine-grained gneiss.  The crossing fractures are lines of weakness which are exploited by the quarrying process by which one block after anther is dragged away by the overriding ice.

 Heavily smoothed and striated bedrock, with a marked fracture scar in the bottom left quadrant of the photo.  This scar shows no traces at all of ice action, suggesting that it is very fresh.

Striations in  the Stockholm Archipelago.  Here, in an area of Pre-Cambrian basement rock with relatively low relief, there are abundant traces of glacial erosion on rock surfaces just above present sea level. The ice of the Scandinavian ice sheet retreated from this area around 11,200 years ago, at a time when the land surface was greatly depressed.  The retreating ice edge was probably floating, and the whole landscape was then deeply inundated by the sea —  to emerge bit by bit as isostatic recovery ran its course.  Isostatic recovery is still going on today, at a rate of c 1 cm per year. 

The last erosive ice to affect this landscape was flowing almost exactly north— south, and this is the direction followed by most striations.  However, there are deviations of as much as 30 degrees, since the ice adapted its flow patterns to the details of bedrock morphology.  We can even say that it adapted to micromorphology, with measurable deviations across an area of a few square metres where there are ridges, gullies and knolls.

How old are the striations?  There are occasional crossing striations, but not many.  I suspect that they are quite fresh, dating from the Weichselian / Devensian glacial episode.  I also suspect that during that glaciation, over a timespan of maybe 20,000 years, there were not many deviations in ice movement direction.  The ice always flowed from the north towards the south.  Given the micro-adaptations we can see on the striated rock surfaces, the ice was remarkably fluid, suggesting considerable meltwater lubrication — but this was not a “wasting ice” situation, since the effects of gouging, rock fracturing and block removal are in many cases quite spectacular, suggestive of situations in which the ice was “frozen on” to the bedrock surface. Striations are in themselves indicators of hard basal ice capable of pressing rocks and rock fragments into the bedrock surface over which it was flowing. I suspect rapid alternations between freezing and basal thawing and sliding — a classic situation for optimal glacial erosion and areal scouring. 

Most of the striations in the photos are less than 5 mm deep, but some are up to 2 cm deep.

Tuesday, 20 June 2017

West Greenland tsunami

From the BBC web site -- one of the houses swept away by the wave

Some images are appearing from West Greenland following the tsunami that struck the coast yesterday.  It looks as if one small village bore the brunt of the wave -- around 30 homes were destroyed, and four people are missing.  Damage in other communities was on a smaller scale.

Tsunamis are extremely rare in Greenland, although plenty of dangerous waves are produced in front of calving glaciers and when large bergs roll over.  This one is thought to have been triggered by an underwater earthquake -- and the water displacement (a prerequisite of all tsunamis) may have happened as a result of an underwater landslide or from a large landslide on a steep fjord side.  In the latter case, there will be an obvious landslide scar.  More info will no doubt be forthcoming -- but this is a very remote area. 

The Lower Palaeozoic sandstones at Stonehenge

 Lump of Lower Palaeozoic sandstone found during the Darvill / Wainwright excavations at Stonehenge in 2008.  This is the biggest sandstone fragment found thus far -- 
it weighs more than 8500 g.

This paper has been floating around for a long time, and is finally published.  Details:


"The petrography, geological age and distribution of the Lower Palaeozoic Sandstone debitage from
the Stonehenge Landscape."
by Rob Ixer, Peter Turner, Stewart Molyneux, and Richard Bevins.

Wiltshire Archaeological & Natural History Magazine, vol. 110 (2017), pp. 1–16


The three major groups of debitage found in the Stonehenge Landscape are dolerites, rhyolitic tuffs (almost exclusively from Craig Rhosyfelin, now designated as Rhyolite Group A–C) and ‘volcanics with sub-planar texture’ now designated as Volcanic Group A and Volcanic Group B. The only other significant debitage group, but only accounting for about 5% by number, is an indurated sandstone now called the Lower Palaeozoic Sandstone.
The Lower Palaeozoic Sandstone is a coherent lithological group with a slight metamorphic fabric and is a fine-grained feldspathic sandstone with characteristic dark, mudstone intraclasts. Palynological (acritarch) dating of the sandstone suggests that it is Late Ordovician or younger whilst the petrography suggests that it is older and more deformed than the Devonian (ORS) sandstones exposed in South Wales.
Spatially, as with all the major debitage groups, the Lower Palaeozoic Sandstone is widely and randomly distributed throughout the Stonehenge Landscape; temporally, almost none of the debitage has a secure Neolithic context but some may have later Roman associations. The debitage cannot be matched to any above-ground Stonehenge orthostat but may be from one or two buried and, as yet, unsampled stumps. (These are stumps 40g and 42c)
The lithology is believed to be from an unrecognised Ordovician (or less likely Silurian) source to the north or northeast of the Preseli Hills.
Although there has been confusion within the archaeological literature between the ‘Devonian’ Altar Stone, Lower Old Red Sandstone (Devonian) Cosheston Group sandstone and the Lower Palaeozoic Sandstone, all three are very different lithologies with separate geographical origins.


 This is a detailed and useful paper which carries forward the work on the Altar Stone (by Ixer and Turner in 2006) and examines it in the context of other sandstone fragments in the Stonehenge collections.  It is still the case that the Altar Stone is inadequately sampled and hence inadequately understood;  but the balance of probabilities at the moment is that it came from the Senni Beds near Laugharne and Llansteffan rather than from the Cosheston Sandstone of Mill Bay on Milford Haven.  The authors here seek to sort out some of the confusion of earlier researchers who have often assumed that assorted sandstone fragments (and those two stumps 40g and 42c) are related to the Altar Stone and therefore have the same provenance.  Rob Ixer and his colleagues demonstrate that nearly all of the "sandstone debitage" in the Stonehenge area is of Lower Palaeozoic age, not Devonian.  The use of palynology as well as detailed petrography (mostly thin section work) showing a "slight metamorphic fabric" is fascinating and quite convincing.

The authors argue that the samples examined from the Stonehenge collections have come from the northern or north-eastern corner of Pembrokeshire, to the north of the Preseli Hills.  The samples are not all identical, and seem to show two sandstone types.  Quote:  Although this might suggest two separate sandstone sources, the petrography of the two lithic samples (and indeed all of the other debitage samples) suggests that they are part of a single sourced lithology and the apparent age discrepancy is a sampling issue. It is hoped that further sampling of the Lower Palaeozoic sandstone will help to determine this.

I'm not sure what is meant here -- if the samples have come from "a single sourced lithology" they could of course have come from widely separated localities or provenances wherever that lithology outcrops -- and how can the "apparent age discrepancy" be a sampling issue?  If there is an age difference between one sample and another, does that not mean that one sample is older than the other, given that there are always some statistical / confidence issues?  Whatever the truth of the matter, it is clear that the debitage needs to be matched with sandstone stumps 40g and 42c -- if those two stones really have provided the debitage fragments, more progress will have been made.  And if they don't match, things get even more interesting.........

At the end of the article:
Wainwright et al. at the conclusion of the Cleal et al. (1995) monograph stated in their ‘future
directions’ for research at Stonehenge that ‘A detailed petrological description of each stone
and the identification of its source’ was needed (Cleal et al. 1995, 492). This paper completes the
initial petrographical descriptions of the major types of non-dolerite bluestone debitage from the
Stonehenge landscape begun in 2006. Now that there is enough petrography to enable a convincing match between buried Stonehenge orthostats, their surface debitage and their potential geographical sources to be realised, it only needs the buried stumps to be sampled.

I think we would all agree with that.......


I'm intrigued by the mention of this unpublished paper, which precedes a lot of the detailed geological work undertake by Ixer and Bevins.  Given that it is now very easy to upload previously unpublished papers as PDF files on ResearchGate, might that not be a good option for Rob to pursue?  Better for it to be read than cited when nobody can see it!

IXER, R.A. 2007. Waiting by the river: Stonehenge and the Severn Estuary. Abstract. Stone artefacts as material and symbolic markers in cultural landscapes. An international perspective. Implement Petrology Group Meeting. York. September 2007

Citing things that are inaccessible is to take the route to notoriety........

Monday, 19 June 2017

Darvill and Wainwright on Neolithic and Bronze Age Pembrokeshire (review, part 2)

Tim Darvill and Geoffrey Wainwright (2016) "Neolithic and Bronze Age Pembrokeshire", Ch 2 in Pembrokeshire County History, Vol 1, pp 55-222


Preseli and Stonehenge 2500 - 1600 BC

This section of the chapter runs from p 156 to p 181.  As indicated on the first page, the authors make no attempt at a balanced discussion of pros and cons or at an even-handed assessment of conflicting theories.  This is simply a promotion effort on behalf of the human transport theory.  A pity -- in a chapter such as this we should have seen something more academically robust.

At the outset, Darvill and Wainwright refer to the research surrounding the bluestones and say it is their intention to dwell on “the landscape from which they were taken.”  They couldn’t be much clearer as to their particular belief system!  After a summary of the character of the Preseli uplands in which they flag up the “special” character of the area (for obvious reasons), the authors turn to the nature of the rocks.  I’m not sure what “geomorphic pressures “ are (p 159) but we’ll let that pass.  They then come to their SPACES project, designed to “provide an archaeological context for the sources of the Stonehenge bluestones.”

On the geology of the bluestones, there is an interesting and mostly accurate assessment of the various rock types represented at Stonehenge, including the work of HH Thomas, Olwen Williams-Thorpe and colleagues, and Richard Bevins and Rob Ixer.  The main types of bluestone are referred to following the Bevins / Ixer system of classification -- dolerites in Groups 1, 2 and 3 (spotted and unspotted dolerites from a number of different outcrops in eastern Preseli); six basic types of rhyolite including three that appear to have come from the Rhosyfelin - Pont Saeson area; two basic types of hard volcanic rock from unknown locations; and two types of sandstone also from unknown sources -- one of them (the Altar Stone sandstone) having come possibly from the Senni Beds of the Old Red Sandstone series.  The authors omit to mention the shapes and characteristics of the 43 known bluestones at Stonehenge, and they omit to flag up the fact that bluestone monoliths, slabs and boulders and recovered fragments have clearly come from at least fifteen (and possibly many more) different sources -- all of which militates against the idea that certain stone types were quarried because they were deemed to be “sacred”. 

In their assessment of the work of Parker Pearson et al at Rhosyfelin over a period of five years, the authors note that no standing pillars at Stonehenge have been sourced to this so-called “quarrying” site -- the evidence all comes from debris found during excavations on Salisbury Plain.  Then comes this very strange statement:  “...there appear to be conflicting views on what exactly was found in the excavations that critics suggest might have been opened up in the wrong place (cf John et al 2015a, 2015b).”  D & W appear to have completely misunderstood the point which I and my fellow authors were making -- namely that there is a rather interesting sequence of Ice Age deposits at the site, and that no matter how hard we searched, we could find no evidence at all for Neolithic or Bronze Age quarrying activity.    We never said that Parker Pearson was digging in the wrong place -- we simply said that he was determined from the outset to find a quarry, and claimed to have found it, in spite of the fact that it does not exist.

In referring to the work of the MPP team at Carn Goedog, the authors accept at face value all of the so-called man-made features (whatever happened to academic scrutiny?) while pointing out that the radiocarbon dates are extremely inconvenient......

There is a summary of the SPACES work led by the two authors of the chapter.  Their purpose is clearly to demonstrate from excavations at Carn Meini and Croesmihangel that these “special places” were the focal points of a great deal of activity in the later Neolithic and early Bronze age.  Over ten pages or more they repeat much of what is already in print.  The evidence of quarrying was not convincing when it was first published

and it is no more convincing today.  They refer several times to the “Carn Menyn Quarry” as having initially produced meta-mudstone for some unknown purpose, and then dolerites presumably destined for Stonehenge, and then finally meta-mudstones again.  The evidence from the excavations suggests occupation over a long time-span, and the authors take great pride in seeking to demonstrate, for the first time, late Mesolithic quarrying activity. However, no hard evidence is presented to suggest actual quarrying activity, and there is nothing anywhere in these pages to suggest that this SPACES research has anything at all to do with Stonehenge.  The radiocarbon dates do not fit, and the authors choose to ignore the work of Bevins and Ixer which suggests that none of the spotted dolerite bluestone monoliths at Stonehenge have come from Carn Menyn / Carn Meini. 

In the discussion on bluestone transport the authors demonstrate that they have little understanding of glaciers or glacial processes.  Kellaway did not “revive” an older idea that the bluestones “were carried on glaciers which spread south before they melted and neatly deposited their bluestone burden on Salisbury Plain.”  Kellaway was much more sophisticated than that. He did after all achieve publication in “Nature” - a journal always known for its strict refereeing standards.  He argued -- with much supporting evidence -- that the Irish Sea Glacier had travelled eastwards towards Somerset, carrying erratics from West Wales within it (not on it) before dumping them, not very neatly.  The glacial theory, as we have pointed out many times, does not “flounder” because of the lack of known evidence of glacial activity on Salisbury Plain or because there is no train of “suitable blocks of bluestone” across south-east Wales.  There are big erratics in many locations in SW England, and they do not have “trails” of similar rock types across SE Wales either.  And if the authors are so keen on “evidence”, why is it that they completely ignore the lack of any evidence for the human transport theory?  No sledges  or boats, no ropes, no abandoned monoliths, no evidence of strong cultural links between Preseli and Salisbury Plain, no evidence of long-distance stone haulage from anywhere else.  They want a cultural aberration, and come hell or high water, they intend to have it........

Then we have this statement:  “.......eminent geologists and glaciologists have dismissed the glacial theory (Bowen 2005; Green 1997; Scourse 1997).”   How many times do I have to point out that none of those three gentlemen is an eminent geologist or glaciologist;  all three of them are geomorphologists like myself, no more and no less liable to making serious errors of interpretation.  Where we place them on the scale of eminence is a matter of opinion.

Thus in a single brief paragraph, Darvill and Wainwright dispose, to their own satisfaction, of the glacial theory and return to the matter in hand.  We are instantly back into the realm of fantasy.  Sewn plank boats were apparently available “around 2000 BC” and could have been used on sea-faring journeys carrying heavy cargoes. The authors omit to tell us that the bluestones were already on Salisbury Plain at least a thousand years earlier than that.  Rafts were used on the Eastern Cleddau for carrying timber for the Pembrokeshire coal mines, and so they could equally well have been used in the Neolithic for carrying bluestones from Preseli. In my book, that’s special pleading.  I wonder whether the authors checked the nature of the Eastern Cleddau between its source and, say, Gelli?  They can take it from me that it’s not a good rafting river today, and was probably no better in the Neolithic.  Then we have the argument about overland transport -- and here the authors invoke the history of the “drover’s roads” and invoke the use of sleds or “slipes” back in the days of our Neolithic heroes.  This is all speculation, unsupported by any evidence.

In seeking to develop the theory that the “Ordovician rocks of the Preseli Hills” were somehow revered in the Neolithic, the authors refer to spotted dolerite medieval inscribed stones and the use of spotted dolerite in chapel building. They seek to demonstrate a continuous history of spotted dolerite use, and seem to think that the “extensive relatively modern quarries in this area” is somehow significant.  This is entirely disingenuous -- they are talking about commercial slate and aggregate quarries, not about dolerite quarrying.  And it is  a statement of the obvious that spotted dolerite boulders and pillars were used in the area in the Neolithic and the Bronze Age, since they littered the landscape.  Many other rock types were represented in the erratic litter, and they were used too.

In their final section (p 179), titled “Why were the bluestones brought to Stonehenge?” the authors again make multiple assumptions that are not underpinned by facts.  They ASSUME that around 80 bluestones were “transported to Salisbury Plain for exclusive use at Stonehenge.”  Pure speculation.  They claim that “the demonstrable antiquity of stone extraction on Carn Menyn ..... tells us something about the ancestral significance and power of the landscape from which the bluestones were taken.”  Pure speculation -- nobody has demonstrated Neolithic quarrying in an area where erratics were freely available for use, scattered across the landscape.  Mynydd Preseli as “the home of the gods”?  Nice thought, but........  Then to MPP and his stone embodiments of the spirits of the ancestors, with bluestones carted about the place and set up as memorials to the dead.  We won’t go there just now, and neither will we delve into the idea of political unification, of which Prof MPP is so fond. Already well covered on this blog.  The holy wells and healing springs of Mynydd Preseli?  There aren’t any.  The Stonehenge temple built in part with bluestones revered for their healing properties?  This idea was entirely fanciful a decade ago, and it is no better supported by fact today.

Overall, this section of the long chapter by Darvill and Wainwright is a profound disappointment, partly because it is so unbalanced.  The authors set out to dwell on the research and ideas surrounding the bluestones and their links with Stonehenge, but dismiss the glacial transport thesis out of hand, in just a few lines, while devoting 99% of the chapter to the promotion of the human transport thesis on the basis of special pleading and the flimsiest of evidence.  In addition, they fail to demonstrate that any of the archaeological features of the “right” age in the Preseli area have anything to do with Stonehenge.  The traces of intermittent human occupation at Rhosyfelin, Carn Meini and Carn Goedog are unexceptional, and have nothing to do with Stonehenge.  They just happen to be places where archaeologists have done some digging.  As far as one can see from the evidence, neither Croesmihangel nor any of the SPACES sites investigated has anything to do with Stonehenge. The Preseli upland springs have nothing to do with it either, and neither does Cana Chapel.  All in all, one has to admire the sheer effrontery of two authors who curtly dismiss the glacial transport thesis for a “lack of any evidence” while going on at great length about the human transport thesis which has, on balance, far less of a factual underpinning.



Sadly, as we reported in an earlier post, Geoff Wainwright died on 6th March 2017:

Sunday, 18 June 2017

Bluestone provenances - updated list

Tim Daw has kindly published this list on his blog:
based on evidence supplied by Rob Ixer.

As we have said many times before, the geological work has confirmed the large number of bluestone (and fragment) sources -- at least 15, and probably many more.  And there are multiple questions about the list which are still unresolved -- in spite of the great advances made by Bevins and Ixer in recent years.  For example, Carn Goedog MIGHT be a source for some of the bluestone monoliths, but the stones listed could also have come from other parts of a rather extensive outcropping dolerite sill.  There is no certainty that stones 34, 42, 43 and 61 have the same provenance -- they might have come from 4 different locations.  The fragments identified as having come from the Rhosyfelin / Pont Saeson area have NOT been assigned with certainty to "within a few square metres" at Craig Rhosyfelin, as claimed by Rob Ixer.  And we do not know that stumps 32d and 32e have come from there -- that is pure speculation.  The rhyolites E, F, and G and the volcanic rock samples referred to as "volcanics groups A and B" have probably come from the Fishguard Volcanic Group, represented by outcrops over a very wide area.  The Lower Palaeozoic sandstone provenances are unknown, and the assignment of the Altar Stone to the Senni Beds is, according to rumour, not as certain as Ixer and Turner have claimed.

We look forward to further work -- but in the meantime we need to take any claims that "the geology is sorted" with a pinch of salt. There's plenty to keep Bevins, Ixer and others occupied for many years to come -- and I share their frustration that EH will not consent to a properly controlled sampling programme for every one of the 43 bluestones known at Stonehenge.

Wednesday, 14 June 2017

Deglaciation of Fennoscandia

I've been looking at a fascinating new paper on the deglaciation of Fennoscandia following the LGM (last glacial maximum).  Here is the source of the maps to follow:

Arjen P. Stroeven et al, 2016. Deglaciation of Fennoscandia. Quaternary Science Reviews, Volume 147, 1 September 2016, Pages 91-121

The images below are high definition, so it should be possible to enlarge them by clicking.

 Main retreat stages.  The most interesting thing about this map is the highly crenulated ice edge on the European mainland, south of the Baltic.  This is a much more accurate mapping than anything done earlier, and it is what one would expect -- an ice edge running out of steam (if you see what I mean) on undulating terrain, pushing into lowland valleys and held up by hills and ridges.  Also, this map shows for the first time the full extent and scale of eskers within the area being deglaciated.  They are incredibly accurate indicators of ice movement directions at the time when the ice was wasting.

 Map showing the main dating points used by the authors in their reconstructions.  In recent years luminescence dating, improved radiocarbon dating and cosmogenic isotope dating have provided a sound database from which ice edge positions can be calculated -- but interestingly enough, the old Swedish varve chronology (developed by Dr Geer and others) was not very far out.......

Main identified ice retreat stages.  The red lines show the retreating ice edge before the Younger Dryas.  The yellow lines show the retreat after 12,700 cal yrs BP.  Note that around 10,200 years ago the remnant of the ice sheet broke into two in the Scandinavian uplands.  Around many of the coasts of the Gulf of Bothnia the ice edge was afloat as it retreated, because the land surface was deeply depressed isostatically.

Monday, 12 June 2017

Darvill and Wainwright on Neolithic and Bronze Age Pembrokeshire (review, part 1)


Tim Darvill and Geoffrey Wainwright (2016) "Neolithic and Bronze Age Pembrokeshire", Ch 2 in Pembrokeshire County History, Vol 1, pp 55-222

This is an extremely long and detailed chapter, carrying the reader through from the time of the earliest farmers to the time of metalwork and the beginnings of hilltop defences around 700 BC.  For the most part it is well organized and easy to follow, as the authors systematically work through all of the key Neolithic and Bronze age phases and describe the main cultural features associated with each of them.  It's rather self-indulgent, since the authors place great stress on their own work, repeating in great detail the contents of assorted published papers -- it could have been more tightly edited and dramatically reduced in length.  That having been said, it is a very useful reference work, with many excellent new maps and diagrams which will no doubt be widely cited.

Interestingly enough, the authors choose to flag up the Stonehenge bluestone connection right from the beginning of the chapter.  This brings me great joy, but looking at it objectively, they would have been wiser to apply a more rigorous and fact-based approach rather than entering into the realms of speculation when that was not strictly necessary.  So on the second page of their text the authors state that the Preseli bluestones at Stonehenge "gave that monument its power and purpose."  Not in my book it didn't.  And on the fourth page we read that HH Thomas in 1923, with his famous paper on the bluestones, "established a robust cultural linkage between south-west Wales and Salisbury Plain."  Oh  no he didn't -- he showed that the bluestones were mostly from Preseli -- no more and no less.  The cultural linkage was and is fanciful, and ironically much of the evidence in this chapter militates against the idea that there were close contacts between west Wales and Stonehenge  at the time that the monument was built.  More of that anon.......

Let's get into some of the detailed points in the chapter. 

On page 62 the authors remind us that the distribution of recorded Neolithic and Bronze Age sites (as shown in the maps based on Dyfed records) "is not necessarily the same as the pattern of prehistoric activity."   I fully agree with that -- I have made those point many times on this blog, while pointing out that we must be very careful about assuming some sort of "special status" for NE Pembrokeshire simply because there are many prehistoric sites that have survived there today, mostly in the uplands.

On p 62, in describing the physical environment of the Neolithic in Pembrokeshire, the authors seem to think that the main valleys were carved by ice, which they patently were not.   They correctly state that there is " a smearing" of glacial drift in the north of the county, but they are not correct in stating that the south of the county is free of these deposits.  They should have looked at the geological maps.  They also omit to mention that one of the most striking of the legacies of the Ice Age is the scatter of many thousands of glacial erratics right across the Pembrokeshire landscape.  These erratics are the basic raw materials for Neolithic and Bronze Age monuments, and the authors appear not to have noticed them.  Maybe they have been too busy looking for quarries,

On page 67 the authors claim that they have found quarries for the exploitation of metamorphosed mudstone at Carn Menyn / Carn Meini.  Their 2014 paper does not support that contention.  Neither does it support the thesis that Carn Meini was one of the area's "persistent places" which was invested with special significance.  It's a little too obvious that this is one of the "persistent theses" of the authors -- but repeating it often does not make it true. It is a statement of the obvious to say that many locations will have traces of many different cultural phases.  Some of them have been dug up by archaeologists, but the vast majority have not.  The dug sites are not necessarily any more important than the undiscovered ones.

There is an interesting section on the early settlement enclosures, at Clegyr Boia, Rhos-y-Clegyrn, Carningli and Banc Du.

The section on megalithic tombs (p 77) is very useful, with a classification by shape and structure: propped stones, simple dolmens and portal dolmens.  There is a passing reference to glacial erratics being used in the case of simple dolmens, but the authors should have stated that almost ALL of the megalithic monuments in the county are made from glacial erratics, and they should have addressed the question of whether the occurrence of these erratics was a prime locational determinant.  Instead, they ponder on siting close to springs, streams and the heads of streams and rivers, and on a preference for views of the sea and of mountains.  This is all fanciful stuff -- one might as well say that the Neolithic tomb builders preferred sites that gave them nice views of the countryside.......

In a useful section on stone axes, the authors refer to the three main Pembrokeshire types, namely Group VIII (silicified tuff), Group XIII (spotted dolerite, sometimes labelled "Preselite"), and Group XXIII (other dolerites, including some that are spotted).  Within these groups of axes, found in many parts of Britain and Ireland, there is considerable variation, and the authors make the sound points that axes or rough-outs were moved about or traded very widely.  This attests to considerable links between Pembrokeshire and other parts of the country -- but there is no evidence of a preferential link with Salisbury Plain.  This is an important point.  The authors also say "The current position regarding the petrological study of stone axes is deeply unsatisfactory"  on the grounds that there is far too much petrological variation within groups and since no quarries have ever been found.  The authors contradict themselves by insisting that there must have been quarries, while also saying that any carn made of a suitable rock was a potential source of axe material.  No quarrying was needed.  They should have added that any convenient and suitable erratic boulder or slab must also have been used, including those located on Salisbury Plain or at any point beween Preseli and Stonehenge. This point has been made forcefully by Olwen Williams-Thorpe and her colleagues, but here it is ignored.  The quarrying obsession is never far away......

On page 112 the authors discuss the decline in the creation of megalithic monuments in the late Neolithic, and they make the point that Pembrokeshire seemingly lacks the spectacular passage graves that occur elsewhere -- for example in Ireland.  Does this mean that Pembrokeshire at this time was more "primitive" or isolated?  This is an issue which they also consider elsewhere in the chapter.

On page 113 Darvill and Wainwright refer to the Carn Menyn Cairn (more later) which they described in print in 2012.  They say the monument occupies  "a significant position on the site of an earlier standing stone and effectively encloses the source of the spring that fed a glaciofluvial channel now known as the Stone River........."   As already discussed on this blog, the idea that there is a "monument " here is really rather dubious; the position is not in the least "significant"; and  the standing stone connection is also dubious.  What on earth do they mean when they say that the site "effectively encloses the source of a spring"?!!  And there is no glaciofluvial channel here either; I have no idea where that statement might have come from.

When they move on to a consideration of the developments after 2500 BC / 4500 BP, the authors argue for a new stress being placed on the value of certain stone types, especially dolerites, that had earlier been used for axe making.  They argue, quite predictably, that dolerite was sufficiently valued for "more than 80 blocks of it to be transported to Stonehenge in Wiltshire".  Experienced academic authors should not make such dubious statements.  They do not know that more than 80 blocks of it were transported; that is pure speculation. In fact, they do not know that ANY chunks of Preseli rock were transported, at any stage in the Neolithic or Bronze Age.  In any case, only some of the bluestones at Stonehenge are made of dolerite.  As we all know, there are many rock types in the bluestone assemblage, including some that could hardly have been of any value in the making of axes. Here we go -- ruling hypothesis again......

In a long discussion of beaker culture, round barrows, cremations, ceremonial sites, stone circles and standing stones we find abundant useful information, although I find myself unconvinced by the assertion that the landscape was "heavily sectored" ( (p 129) with occupation mainly on the coastal plain and a "ceremonial focus" on the upland areas of the north.   I think there is special pleading or circular reasoning going on here, designed to flag up, in the mind of the reader, the idea that Preseli was "special" enough to justify a large-scale bluestone transport enterprise.  Nor am I convinced by the assertion that significance was attached to the removal and re-location of small fragments of stone from Preseli that were considered to be talismans -- leading up to the climax of the story involving the transport of big blocks of bluestone from Preseli to Stonehenge.  The time sequence is not established.  The finding of axes, fragments and big blocks of bluestone on Salisbury Plain is far easier to explain if we assume that the Neolithic and Bronze Age inhabitants of that area simply found them there and used them according to whim and circumstance, sometimes for tool making and sometimes for  making architectural statements. Of course, the idea that the standing or fallen bluestones at Stonehenge were used for tool-making (when the locals got fed up with the monument) has been around for a very long time.

Then comes a very long section (pp 156-181) on Preseli and Stonehenge, which deserves separate consideration.  To be continued.......

Friday, 9 June 2017

How not to move a bluestone monolith

How not to move  a bluestone.  I came across this old photo when sorting out my photos.  From the year 2000, on the occasion of the Millennium Bluestone Expedition which ended (as you will recall) with complete disaster.  On this rather gentle hill, the stone went completely out of control, and veered across the central reservation.  LUCKILY THERE WAS NO LOSS OF LIFE.

But the stone (which was rather a small one) ended up on the bed of Milford Haven almost as soon as it took to the water, and had to be rescued by the Royal Navy.  After being stored behind some sheds in Milford Haven docks for several years, it was taken off to the Welsh National Botanical Garden, where it still sits, rather forlornly, on its sledge.   I helped with the pull on land, and in spite of unlimited manpower, asphalt roads, modern ropes and harnesses, and rolls of low-friction netting, the whole thing was a shambles (and a scandal too, since over £100,000 of public money was expended on the experiment).  I had fun on my day of pulling, as did everybody else, but it proved to all of us involved that the bluestones were probably NOT pulled by human beings from Pembrokeshire to Stonehenge............

Sunday, 4 June 2017

Washed moraines on the west coast of Sweden

 Washed moraine surfaces on the west side of the island of Rörö, in the archipelago to the north of Göteborg, Sweden.  The expanse of pebbles and boulders seen in the lower photo is still washed by extreme storm waves in the winter, and because of the very exposed position of this coast a vast quantity of flotsam and jetsam is thrown up every year.   Children have had considerable fun here, creating a structure which is part den and part work of art......

It's amazing what you find when you go for a walk.  We arrived in Sweden a couple of days ago for the annual hols, and our good friends Anita and Bengt suggested a trip to the little island of Rörö, which could be reached after a short ferry trip.  There were lots of interesting pebbles there, so they said.  Well, I can never resist looking at interesting pebbles, so we packed up a picnic and off we went.  

What an amazing landscape!  When we reached the western side of the island we found ourselves in a strange wilderness of gravel, pebbles and boulders of all sizes, in places quite difficult to walk over, interspersed with patches of scrubby west coast vegetation, rock outcrops,  and a few pools of water.  This "klappersten" terrain (meaning pebbly stone terrain) is up to 500m west-east, and stretches along the coast for maybe  1.5 km.  In places there are clear ridges of storm beach material, and in some of the inlets there are clear strandlines, as can be seen in the Bing image below.  The ice-moulded terrain of the greater part of the island (quite typical of the west coast archipelago) is shown grey in the image, and the pebbly terrain to the west shows up as white.  The ice moved across this area roughly from NE towards SW.

Most of the strandlines are less than 20m above present sea-level.  I reckon that big storm waves sometimes affect the surface up to a height of c 10m and maybe 50m inland from the shore.

I thought at first that this whole area was made up of a large suite of strandlines or raised beaches, but I quickly noticed that the degree of stone and boulder rounding was not sufficient to justify that interpretation, and the only possible alternative explanation is that this must be a vast expanse of morainic debris laid down during one of the big retreat stages of the Scandinavian Ice Sheet after 20,000 years BP.  Sea level must have been higher than it is today because of isostatic loading, but on a rising coast the morainic expanse was not affected by wave action for very long -- the result being a washing out of finer material and a survival of most of the sub-angular and faceted stone shapes typical of glacial moraine.

So -- this is a classic washed moraine landscape.  It's probably featured in all the Swedish glacial geomorphology text books -- but I have not had time to check!

Just before putting this post together, I checked out the maps of Scandinavian Ice Sheet retreat stages, and sure enough I see that the outer part of the archipelago in this area reveals fragments of the "Halland retreat moraine complex" dated at around 16,800 - 16,200 years BP.  So there we are then-  my observations slot very nicely into the established chronology.

On this map the Halland coastal moraines are shown, on the outermost islands of the western archipelago.

Source:  "Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with 10Be exposure dating", Journal of Quaternary Science 27(2):211-220 · February 2012, by Nicolaj Krog Larsen, Henriette Linge, Lena Håkansson, Derek Fabel

Sunday, 28 May 2017

Preseli -- the naked truth

A very revealing story from the Pembrokeshire Herald, for all those who are interested in Stonehenge and the bluestones.  In case you wondered, the tor in the photo is Carn Bica, and the pic was taken from Bedd Arthur, one of the places where King Arthur is buried.  Has Arthur risen from the grave, to save us from Brexit, just as he promised to do?  Watch this space -- I shall report any further sightings of this mysterious figure..............

Preseli Hills: Shocked walker photographed naked ‘feral looking’ man


May 28, 2017

A WALKER says that he encountered a feral looking naked man on his walk on the Preseli Hills yesterday (May 27)

The astonished visitor says that he managed to keep cool, calm and collected and even managed to take photographs of the mystery individual on the well known trail near Eglwyswrw.

Nick Pentecost told The Herald: “It was the weirdest afternoon walk yesterday ever!  I went for a wander, as I regularly do, into the Preselis.

“I was walking to the top of Carn Goedog with no one around as usual except in the distance I suddenly thought I saw this figure and as I looked closely it turns out I was right. To my amazement and shock I realised I was looking at a feral looking man, hunched over looking at the ground.

“I paused and managed to get my phone out and take a few snaps.

“I watched him walking around kind of calmly and sort of aimlessly for about 20 seconds then I think he noticed me and I very quickly turned and sped back down the mountain to my car.

“I looked back to see if he had followed me but didn’t see the figure again.  Very, very strange!"

Friday, 26 May 2017

Stuart Piggott at work (not Atkinson)

I love this picture from the Atkinson collection at English Heritage.  The great man is the one with the pipe.  This was taken in the good old days, before safety was invented.......

Postscript:  Originally I headed this post with a reference to Richard Atkinson  -- but thanks to Simon we now know that the fellow on his knees, smoking a pipe, wearing a natty boiler suit,  is Stuart Piggott.

Tuesday, 23 May 2017

Sunday, 21 May 2017

Preseli: the eastern tors

I rather like this photo, taken a couple of days ago!  Click to enlarge......

Carn Meini (the craggy area at top left) is often described as the most prominent feature of the Preseli skyline,  and this is used as an explanation for its desirability as a sacred site and as a quarrying site.  Actually the prominence of the skyline features is very dependent upon where you are standing.  If you are a Neolithic trader wandering along the "Golden Road" or ridge trackway, on the spine of Mynydd Preseli, Carn Meini is not particularly prominent, and from this viewpoint (on Foel Dyrch) the most prominent of the tors is Carn Gyfrwy -- the one towards top right.

Anyway, whatever the perceived desirability and significance of particular crags might have been, this is a rather wonderful landscape.......

Stonehenge and the arrival of the Beaker hordes

An interesting article in the paper today:

It suggests that during the construction of Stonehenge there was a major incursion into Middle England of the Dutch tribes bearing beakers.  Must check out how strong the evidence is -- there is clearly some debate.  But it's suggested in the article that this all happened before "the Stonehenge project" was completed.  So does this back up my thesis that Stonehenge never was completed?  I have always had concerns that the "immaculate Stonehenge" made of c 80 sarsens and c 80 bluestones -- as imagined by generations of archaeologists, tourist operators and artists -- is not actually supported by hard evidence on or in the ground........

I'm also intrigued by what this new research means for all the current hype relating to Durrington Walls.  Were the gigantic hog roasts much beloved of MPP and others jolly international affairs to which the Dutch were invited, or were they the last hurrahs of a culture about to be replaced?

 Postscript:  Is migration making a comeback, at the expense of acculturation?  And the idea that beer was a key component of the movement of beakers and tribes is an interesting one.  Maybe all those wild BBQ events at Durrington Walls really were drunken orgies initiated by the Dutch invaders?

From Wikipedia:
Migration vs. acculturation
Given the unusual form and fabric of Beaker pottery, and its abrupt appearance in the archaeological record, along with a characteristic group of other artefacts, known as the Bell Beaker "package", the explanation for the Beaker culture until the last decades of the 20th century was to interpret it as the migration of one group of people across Europe. However, British and American archaeology since the 1960s had been sceptical about prehistoric migration in general, so the idea of "Bell Beaker Folk" lost ground, although recent genetic findings lend renewed support to the migratory hypothesis. A theory of cultural contact de-emphasizing population movement was presented by Colin Burgess and Stephen Shennan in the mid-1970s.[29]
Under the "pots, not people" theory the Beaker culture is seen as a 'package' of knowledge (including religious beliefs and copper, bronze and gold working) and artefacts (including copper daggers, v-perforated buttons and stone wrist-guards) adopted and adapted by the indigenous peoples of Europe to varying degrees. This new knowledge may have come about by any combination of population movements and cultural contact. An example might be as part of a prestige cult related to the production and consumption of beer, or trading links such as those demonstrated by finds made along the seaways of Atlantic Europe. Palynological studies including analysis of pollen, associated with the spread of beakers, certainly suggests increased growing of barley, which may be associated with beer brewing. Noting the distribution of Beakers was highest in areas of transport routes, including fording sites, river valleys and mountain passes, it was suggested that Beaker 'folk' were originally bronze traders, who subsequently settled within local Neolithic or early Chalcolithic cultures creating local styles. Close analysis of the bronze tools associated with beaker use suggests an early Iberian source for the copper, followed subsequently by Central European and Bohemian ores.

Tuesday, 16 May 2017

Pwllderi Cliffs, Pembrokeshire

This pic has nothing very much to do with the Quaternary, and nothing at all to do with Stonehenge, but I post it herewith simply because I like it!  This is the most impressive cliff rampart in Pembrokeshire, with cliffs over 120m in height.  (Normally around this coast the cliffs are 30m high, or less........)

The light on the cliffs when I took this photo was perfect -- when the cliffs are completely in the sun, or completely in shade, you see far less detail.

Click to enlarge.

Ice-moulded features near Strumble Head

These images are from the west coast of the Pencaer Peninsula in Pembrokeshire, between Pwllderi and Strumble Head.  I have shown some images from here before, demonstrating the extent of ice moulding.  Had a most pleasant walk there on Sunday, in glorious weather -- so I did some more photography.

Here the Devensian ice of the Irish Sea Glacier was moving directly onshore, and the extent of "debris cleaning" and ice moulding is very impressive.  I have not seen any obvious striations.  We can only assume that these features are of Devensian age, although of course we cannot discount the possibility that some are inherited from earlier glacial episodes.

There are of course other areas of ice-moulded bedrock in N Pembs -- and I have already illustrated this in locations like Garn Fawr, Carningli, Carn Meini and Carnllidi.

It would be rather interesting to get some cosmogenic dates for these surfaces........

Friday, 12 May 2017

New book on Preseli

A new book on Preseli has just been published -- written by my old friend Dyfed Elis-Gruffydd.  It will be a fascinating read, for those who can read in Welsh.  Anyway, I'm happy to do my bit in promoting it, since it will, I am sure, be reliable!


Wednesday, 10 May 2017

The Boles Barrow Bluestone -- more photos

Many thanks for these photos of the Boles Barrow bluestone, kindly sent in by Phil Morgan.  Here we can see that most of the surface is heavily weathered and abraded -- and even polished -- suggesting surface exposure over a very long time period.  We can also see the "broken" part of the stone, with a relatively sharp edge to it -- and we can see the much "fresher" rock surface which has nothing like the same degree of weathering.

One question (which we have already discussed extensively) is whether this boulder was genuinely found inside Boles Barrow, or whether it actually came from Stonehenge.  The other question is this:  is this a broken-off part of a larger monolith, or is it simply an erratic boulder with facets of different ages on it?  Clearly the archaeologists would like it to be a piece of of monolith, the rest of which might still be at Stonehenge.........  and that question could possibly be resolved by cosmogenic dating on the "old" and "new" surfaces of the boulder.

Monday, 8 May 2017

Strontium isotope ratios in Stonehenge cremated bone

Thanks to Dave S for drawing attention to the latest Channel 5 blockbuster called "The Final Mystery of Stonehenge" -- featuring Prof Mike Parker Pearson and Francis Pryor competing in the purple prose and memorable insight stakes.    It is a 45 min programme, full of portentious commentary and dramatic music.  You know the sort of thing.......

Here is the link:

There was nothing in the programme about the "quarrying" and transport of the bluestones, but a lot about Durrington Walls, pigs, wild celebrations, ancestors and cremations, and periglacial stripes.  You know the sort of thing.........

So there was nothing very new.  But I was quite intrigued by some of the work here reported upon -- particularly that of Dr Christophe Snoeck of the Geology Dept at Brussels University.  In the programme there was a clear attempt made to suggest that "some of the bones" found in the collection of 500,000 bits and pieces from Aubrey Hole No 7 had come from West Wales, and that some of the pigs gobbled up in those great feats had come from West Wales too.  The bluestone and human transport connection was obvious -- it's all part of the attempt to build the myth.

But if we do some simple scrutiny, what do we find?  We find that most of the bone fragments (c 66%) were rather local, ie from the Salisbury Plain area.  That means that around 33% were from further afield.  And just some of those are apparently from West Wales.  What percentage?  I have written to Dr Snoeck to find out.

And how sound is the idea that they have come from West Wales anyway?  I have looked at the strontium isotope ratio maps again, and have found that there is no way that provenancing can be done with that sort of accuracy.  Dr Snoeck uses the maps of Dr Jane Evans and others, which show that the ratios for West Wales are the same as those for large parts of East Wales,  Exmoor, Dartmoor, the tip of Cornwall, parts of North Wales and Anglesey, the Southern Uplands of Scotland, and the Grampians. 

It is perfectly reasonable to suggest that the bone fragments examined by Dr Snoeck are much more likely to have come from Devon or the Welsh Borders, since those areas are much closer to Salisbury Plain.

Spapdash pseudo science yet again, from Prof MPP, Francis Pryor and the people who put this programme together.  They clearly do not expect scrutiny of the abundant goodies that they scatter before us....... and assume that we will just lap it all up.

 Strontium isotope ratio map from one of Dr Snoeck's papers, relating to a site at Langford.

 The much-cited map put together by Dr Jane Evans and others.  There is nothing unique, in terms of provenancing, about West Wales.

Sunday, 7 May 2017

Whatever happened to the Boles Barrow Bluestone?

This nice pic of the stone in Salisbury Museum (courtesy Tony H) is from my post of last August, and reminds us that everything has gone rather quiet on the matter of that particular lump of spotted dolerite.

Wasn't there supposed to be a new report on the stone, incorporating some petrology (Ixer and Bevins, I presume?) designed to identify whence it might have come, and the detailed laser scans of its shape and micro-morphology? 

I assume that the Museum was keen on this research, so as to make more of one of its prize exhibits........

Does anybody know anything about the status of this research?  Is there an article in the pipeline?

Saturday, 6 May 2017

Hitchens's Razor and a century of scientific fraud

Today I came across a rather interesting piece in Wikipedia, about Hitchens's Razor:

Hitchens's razor is an epistemological razor asserting that the burden of proof regarding the truthfulness of a claim lies with the one who makes the claim; if this burden is not met, the claim is unfounded and its opponents need not argue further in order to dismiss it. It is named, echoing Occam's razor, for the journalist and writer Christopher Hitchens, who, in a 2003 Slate article, formulated it thus: "What can be asserted without evidence can be dismissed without evidence."

This is rather timely, since it is exactly 100 years since HH Thomas invented one of the great British myths -- namely the human transport of bluestones from Preseli to Stonehenge.  (I reckon he formulated his idea during the First World War, prior to publication in 1923.)

If you put "Herbert Thomas" into the search box you will find a string of previous posts on HHT and his theory,  which was essentially an assertion without evidence.  Evidence concerning the Preseli sources of "bluestones" found at Stonehenge is simply evidence of provenance -- it has nothing whatsoever to do with mode of transport.

I'm still rather convinced that Thomas was involved in a hoax which has fooled the archaeology establishment (and the British public) for the last century.  Because his mad theory is now treated as orthodoxy, the people who are currently treated as heretics are Geoffrey Kellaway, Olwen Williams-Thorpe and others (including me) who have dared to argue the case for glacial transport and who have questioned some of the assumptions underpinning the human transport hypothesis.

But hang on a moment.  Isn't this a grotesque distortion of something that should be amenable to scientific testing and debate? 

What do we know?  There are many different rock types represented in the "foreign stone assemblage" at Stonehenge.  Many of the rhyolites, and maybe all of the spotted dolerites, come from the eastern end of the Preseli Hills and from the outcrops of Fishguard Volcanics between there and the north Pembrokeshire coast. The stones are heavily abraded and weathered, and they come in all shapes and sizes.  Most of them are boulders and slabs -- not pillars.   From abundant evidence from many different disciplines, we know that during the Ice Age the great Irish Sea Glacier flowed across Pembrokeshire approximately from NW towards SE, and that on at least one occasion the ice pressed all the way up the Bristol Channel to the coasts of Devon and Cornwall and into the low-lying depression of the Somerset Levels.  The bluestone assemblage at Stonehenge seems to have come for the most part (probably including the Altar Stone) from a very narrow band of countryside, where glaciological theory tells us that entrainment of erratics should have occurred, maybe between parallel-flowing streams of Irish Sea and Welsh ice, as argued by Lionel Jackson and myself in an article in EARTH magazine.

The inevitable conclusion from all of this must be that the Stonehenge bluestone assemblage is an assemblage of glacial erratics, maybe deposited in conjunction with other glacial deposits, and maybe not.  If one uses the principle of Occam's Razor, there is simply no need for any other theory, and geologists, glaciologists and geomorphologists simply need to concentrate on finding the solutions to two crucial questions: exactly when did this event occur?  and exactly where was the ice edge located when the erratics were dumped? (There are other questions as well, relating to glacial dynamics and sedimentation processes, but don't let's complicate the issue.....)

Seen in this context, and given the recent geological findings by Rob Ixer, Richard Bevins and their colleagues, if anybody was to come along today and suggest, out of the blue, what HH Thomas suggested in 1923, he or she would simply be laughed out of court.

Back to the Bluestone Heresy.  The real heretics are not Geoffrey Kellaway and Olwen Williams-Thorpe, but Herbert Thomas, Richard Atkinson, Tim Darvill, Geoffrey Wainwright, Mike Parker Pearson, Richard Bevins, Rob Ixer and a myriad of others who have led the world off on a wild goose chase, based upon the entirely false premise that glacial transport of the bluestones was and is impossible.  This heresy has even been perpetrated by geomorphologists including James Scourse, Chris Green and David Bowen, who should have known better.

The real heresy is the story of the human transport of the bluestones, as a result of which the scientific community has wasted many years of research effort and dressed up a crazy myth as an article of faith.  Much of the recent effort has to do with the search for non-existent bluestone quarries.

Back to Hitchens's Razor.  The HH Thomas human transport myth was asserted without evidence.  It can therefore be dismissed without evidence.  The burden of proof regarding the claim rested initially with HH Thomas.  It was not met, and it should therefore have been dismissed in 1923.  After a century of naive acceptance and elaboration by several generations of myth-makers, the claim is STILL unfounded and its opponents (people like Olwen Williams-Thorpe, Dyfed Elis-Gruffydd and I) are under no obligation whatsoever to argue further in order to dismiss it.


I have been thinking further about the "other" part of the quote from Hitchens featured at the top of the post:  "... extraordinary claims require extraordinary evidence...."....... on the basis that this is an elementary rule of logic.  Well, from every possible angle, Thomas's idea about the human transport of the bluestones was "extraordinary", since there was and is no evidence from Wales that the bluestones (of many different types) were considered special in any way; since there are no other records of the long-distance transport of megaliths for use in ritual or other settings anywhere in the British Isles; since there are no radiocarbon or other dates which can verify the haulage of the stones at the time required by the archaeologists; and since no ropes, sledges or rafts have ever been found which might demonstrate that the haulage project was technically feasible.

From the very beginning, this has been a hoax or a scientific fraud, and it is truly amazing that the archaeological establishment and even a section of the science community has gone along with it for so many years.  We don't even have any "ordinary"evidence in support of it, let alone the "extraordinary" evidence demanded by logic.

Thursday, 4 May 2017

Foel Drygarn stone extraction features

Thanks to Dave for pointing out the interpretation issue on the southern (rocky) flank of the Foel Drygarn hillfort site.  Are the ridges there, beneath the rocky outcrops, defensive embankments of featres related to the extraction of scree and loose stone for use in the Burial mounds?

The burial mounds were, according to Coflein, built some time before the defensive structures were put in place.  The mounds are assumed to be Bronze Age, and the fortified site is assumed to be Iron Age.

If you look carefully at the middle image above (thanks to Coflein) you can see that the outer embankment extends round on the SE part of the hill summit -- and this is shown on the Univ of Portsmouth plan reproduced below it.  There are also hut circles inside this part of the embankment -- so this was part of the "living area" of the fort.  The southern footpath is also clearly shown. 

The area which I find rather intriguing is to the west of that footpath -- at the SW part of the hill summit.  Here there does not appear to be any embankment beneath the crags, but there does seem to be a little backslope in places, and a distinct terrace which I assume served the purpose of being a convenient trackway for the hundreds if not thousands of stone carrying journeys made by the builders of the cairns.

Click to enlarge the images.

Watch this space......

Wednesday, 3 May 2017

Craig Rhosyfelin -- why Literature Wales is up the creek

In the "Land of Legends" web site published by Literature Wales for the Welsh Government, we have a lot of interesting information, attractively packaged.  The "site entries" are by and large reliable, and most of the inaccuracies are of a minor nature and are not worth bothering about.  But those entries are supposed to be factual, reporting on myths rather than making them.......

As I have reported, the Craig Rhos-y-felin entry should probably not have been included at all, since there is no mythology attached to the site.  But for better or for worse, there it is, written by Bronwen Price of Literature Wales, who has an archaeology doctorate and who should therefore know what she is talking about.   It's a bit unclear whether there was any Cadw involvement in the choice of the site, but I suspect that the Pembs Coast National Park might be behind it, given its track record of trying to push it as the next great thing on the prehistoric heritage front.  Anyway, in almost every respect, this entry is at fault, portraying the assumptions and speculations of a few archaeologists as established fact.  A more balanced assessment of this site is here:

See also:

JOHN, B.S, ELIS-GRUFFYDD, D &  DOWNES, J (2015a). "Quaternary Events at Craig Rhosyfelin, Pembrokeshire." Quaternary Newsletter, October 2015. No 137, pp 16-32.

JOHN, B.S., ELIS-GRUFFYDD, D & DOWNES, J (2015b). Observations on the supposed ‘Neolithic Bluestone Quarry’ at Craig Rhosyfelin, Pembrokeshire. Archaeology in Wales 54, pp 139-148.

With regard to the “site description”, this is what I have pointed out to Cadw and to Lit Wales:

Some of the bluestones of Stonehenge were quarried here. There is no evidence to support this statement.  Some small fragments of foliated rhyolite found in the soil at Stonehenge appear to have come from the Rhosyfelin area — that’s the best that can be said.  They might have come from destroyed cutting or slicing tools.  The use of the word “quarried” is entirely inappropriate.

First used for a local monument in about 3400 BC, they were moved to Salisbury Plain 500 years later where they stood in various settings before the giant inverted ‘U-shaped’ stones joined them in 2500 BC.   There is no evidence for there ever being a “local monument” or photo-Stonehenge in the local area around 3400 BC or at any other date.  That is a piece of unsupported speculation from Mike Parker-Pearson. There is no evidence that the stones were moved to Salisbury Plain by human agency c 2900 BC or at any other time.  The smaller bluestones at Stonehenge were indeed moved about and used in various settings, but there is no proof that the sarsens were not used on the site until later. The expression “giant inverted U-shaped stones” is really rather strange — each of the trilithons consists of two uprights and a capstone.

This makes Stonehenge a truly Welsh site…..  This is nonsense.

…..something supported by the Boscombe Bowmen: seven individuals re-buried in a mass grave near Stonehenge around 2300 BC. All were  seemingly born and raised in south-west Wales, travelling to Wessex during their lifetime.  This is wild speculation — I know of no evidence linking the Boscombe Bowmen to SW Wales. According to all the published analytical data, they are just as likely to have come from elsewhere in South Wales, Devon, Cornwall, or the Lake District or any other area of ancient rocks.

This connection and journeys from the west are recalled in folk legend - Geoffrey of Monmouth (c. 1100-1155) retells the ancient belief that Merlin brought Stonehenge from Ireland.  The idea that Geoffrey of Monmouth was repeating some ancient “folk memory” has been around for a long time!  But we now know that he invented many of his stories with political and PR considerations in mind — and he was indeed in the business of promoting Wales and its heroes.  He was a fiction writer, and not an historian, and he invented the “ancient belief” himself.

The rock face retains the natural pillar formations which the stone-cutters exploited.  This is incorrect.  On the rock face there are many intersecting fractures, which explains why the most predominant shapes in the slope accumulations are slabs and blocks rather than elongated pillars.  There were no “stone-cutters” at Rhosyfelin, in spite of what Mike Parker-Pearson may tell you.  In the Neolithic there was no method which allowed the cutting of stone.

You can enjoy a picnic where they camped 5400 years ago.  This at least is partly true!  Radiocarbon dates show that there is a long history of intermittent occupation by hunting and gathering parties at Rhosyfelin, between the Mesolithic and the Middle Ages.  None of the dates coincides with a supposed "quarrying phase".  But this is indeed a very pleasant picnic site………. if you take care not to try and cross the ford when the river is running high or visit when the roads are icy!

I am still bemused as to why Literature Wales will not re-write this entry on the "Land of Legends” site to more accurately represent the scientific consensus. Stubborn mules and ostriches with heads in sand come to mind.  Neither Visit Wales nor Literature Wales should be in the business of inventing or promoting new myths based on dodgy science.

Replacing that fantasy-driven entry would only take a minute's work, and would at least demonstrate an acceptance of the fact that none of us gets everything right, all of the time.

Tuesday, 2 May 2017

St Davids Head hut circles

Here is a fabulous Bing image of the cluster of six hut circles near the tip of St David's Head.  They are on a grassy bank looking down at the sea, with some measure of protection afforded ny the rocky ice-scoured outcrops to the north and west.  On the image we can also see the bank and ditch fortification that protected the settlement -- this is towards the right0hand edge of the image, with a clearly defined pathway cutting through it.  The assumption is that this is Iron Age, but the huts might be earlier.  Strangely, only three of these circles are mentioned in the archaeological literature....

A very beautiful settlement site!

Image courtesy Chris Andrews