The 'Gleision' (Green) Gardens Project – a Pembrokeshire initiative involving Adam working in the garden alongside the communities of Cilgerran, Eglwyswrw, and Cemaes.
Stonehenge and the Ice Age
How much do we know about Stonehenge? Less than we think. And what has Stonehenge got to do with the Ice Age? More than we might think. This blog is mostly devoted to the problems of where the Stonehenge bluestones came from, and how they got from their source areas to the monument. Now and then I will muse on related Stonehenge topics which have an Ice Age dimension...
Some of the ideas discussed in this blog are published in my new book called "The Stonehenge Bluestones" -- available by post and through good bookshops everywhere. Bad bookshops might not have it....
To order, click HERE
Wednesday, 12 August 2026
More on the Unofficial Gorsedd Circle at Croft
The 'Gleision' (Green) Gardens Project – a Pembrokeshire initiative involving Adam working in the garden alongside the communities of Cilgerran, Eglwyswrw, and Cemaes.
Monday, 10 August 2026
The mystery of the Croft Gorsedd Circle
This circle appears to have been made of authentic bluestone erratics collected in the local area. The eisteddfod official web site determinedly makes no mention of this circle, and so it is an "unofficial" feature of the landscape. You don't need planning permission to pick up a glacial erratic from one place and stick it in the ground somewhere else. Presumably that applies to 12 stones as well as to one. And presumably the circle is not a "structure" as understood in planning law -- we might prefer to call it "an arrangement"................
On the other hand the planning situation might be rather more complicated.........
Detective work is under way. Before long, I hope to be in a position to tell the story of how this very erratic stone circle came to be where it is.
Here are some other pics from Facebook.
Sunday, 9 August 2026
The Gorsedd stone circle at the Llantwd National Eisteddfod
Had a grand day out at the Welsh National Eisteddfod in Llantwd, near Cardigan, on Friday. Here is Inger perched next to one of the standing stones in the Gorsedd Circle -- in the maes or large open area where assorted ceremonials are conducted.
The Gorsedd Circle is a profound disappointment! I am greatly saddened. I had expected something grandly spectacular, but what we found was a rather feeble circle of 12 stones, each one just over a metre tall, all made of fibreglass and some sort of modern resin -- and all given a garish blue colour. Well, the Eisteddfod was branded as "Eisteddfod y Garreg Las" -- the bluestone eisteddfod. On doing a bit of research, I discovered that the pseudo "stones" are used every year at the eisteddfod, in the centre of whatever location might have been chosen.
The artificial stones are expected to have a life of about 50 years, and they were first used in 2004. This was done initially to reduce the cost of installation (and removal, if the stones are put up on farmland) but of course it is argued that it would not be a good idea to plunder the natural stone resources of protected areas such as Mynydd Preseli........ and that is fair enough. So there are no modern bluestone quarries, much to the disappointment of the bluestone quarry hunters...... and if it comes to that, no pieces of terrain from which bluestone erratics have been collected up and carted away by the eisteddfod faithful.
To make matters more confusing, there is actually a modern stone circle associated with the Llantwd Eisteddfod, but that is in Narberth, many miles away in mid-Pembrokeshire. That was built in 2025, for the proclamation of the eisteddfod -- which has to be done, according to an invented tradition, at least a year and a day prior to the esteddfod itself.
And to make matters even more confusing, there is a Gorsedd Circle in Cardigan, close to the Netpool, which comes up accidentally on Google searches -- but that circle relates to the Cardigan eisteddfod of 1976 -- and it has nothing at all to do with 2026.
By the way, the stones are supposed to be "unhewn" -- ie unquarried, but collected up in their natural state from the litter of erratic rocks occuring in the landscape. Where did that rule come from? Was there maybe a geomorphologist in some early Eisteddfodd Gorsedd of Bards who insisted on respect for natural processes?
The symbolism of the Gorsedd Circle? Well, there are supposed to be 11 equally spaced stones in the circle, and one additional outlier or inlier creating an alignment to the midsummer solstice. In the centre of the circle there has to be a larger recumbent stone referred to as the Altar Stone. It can be seen near the right hand edge of the photo, with handy handrail. As far as I can gather, the practice of sacrificing virgins was given up some years ago, out of deference to local sensibilities.
Wednesday, 5 August 2026
Progress on the Meaden Cobble
Thanks to Paula and Martin, and thanks to the staff at the Whatley "super quarry", we now have some quarried rock samples to compare with the hand-sized sample found by Terence Meaden near West Kennet. The rock types in the quarry are quite variable:
Organic Dark Beds: The main body of the Black Rock Limestone exposed in the lower benches of the quarry is a deep, dark grey to near-black. This rich pigmentation is caused by a high concentration of organic material from ancient marine plants and algae, mixed with fine terrigenous muds.Extensive Top Dolomitisation: Unlike the cleaner, purely blue-black beds found elsewhere, the top of the Black Rock Limestone sequence at Whatley has undergone extensive dolomitisation. Magnesium-rich fluids altered the original limestone, resulting in highly weathered, earthy, brownish-black and buff-coloured zones.
The Angular Unconformity: Directly over the top of this dark, weathered Carboniferous sequence sits a flat, horizontally bedded layer of pale, sandy-buff Jurassic oolitic limestone. This forms a clear unconformity, highlighting the dramatic boundary between the older, dark, muddy, steeply dipping limestone and the younger Mesozoic rocks.
DOI:
10.13140/RG.2.2.10844.86401
The Newall boulder at Stonehenge: correcting the "corrections". Available from: https://www.researchgate.net/publication/399619799_The_Newall_boulder_at_Stonehenge_correcting_the_corrections[accessed Jan 10 2026].
.....................in response to this disgraceful ad hominem attack on my competence and integrity:
Richard E. Bevins, Nick J.G. Pearce, Rob A. Ixer, James Scourse, Tim Daw, Mike Parker Pearson, Mike Pitts, David Field, Duncan Pirrie, Ian Saunders, Matthew Power. 2025. The enigmatic ‘Newall boulder’ excavated at Stonehenge in 1924: New data and correcting the record, Journal of Archaeological Science: Reports, Volume 66, 105303.
Monday, 27 July 2026
Foel Drygarn -- the prehistoric quarry they chose not to see
The Foel Drygarn prehistoric quarry complex, showing the four areas from which thousands of tonnes of stone (mostly small angular slabs) have been removed for construction projects
Hidden in plain sight? So prominent that it was mistaken for something else? Whatever the reason might have been, I don't think there is any mention, anywhere in the flood of articles about the "monolith quarries" at Rhosyfelin and Carn Goedog, of the Foel Drygarn quarrying complex which extends over 15,000sq m (300m x 50m) on the flank of the Foel Drygarn hill summit. According to my calculations, over 14,000 tonnes of stone have been shifted:
https://brian-mountainman.blogspot.com/2023/03/the-foel-drygarn-quarries-what-is.html
https://brian-mountainman.blogspot.com/2018/10/the-prehistoric-quarries-at-foel-drygarn.html
Parker Pearson, Ixer, Bevins and the others must have known about it, since it is specifically mentioned in reports by Coflein / Archwilio in and around 1968. The word "quarries" is used in two places in the published map of the site, following work by Hogg and others. And it is so obvious that you can't miss it, if you wander about near the hill summit today -- mercifully free of covering vegetation and available for easy inspection in all its detail. I have described it in a number of posts on this blog. Nobody has questioned or denied the accuracy of what I have described.
So Parker Pearson et al knew about the quarry and chose to ignore it. Why? Well, it was only too obviously very inconvenient indeed, since it did nothing to confirm their fantsastical "monolith extraction" narrative.
If they had had any respect for the due processes of scientific investigation, the first thing that they would have done, when the idea of quarrying came into the frame, was to ask "what do we know already about prehistoric stone quarrying in the upland terrain of Mynydd Preseli?". They would have visited and investigated the site. looking for any lessons that might be learned. But of course that would not have served their purpose..........
If they had looked at Foel Drygarn, their papers on Rhosyfelin, Carn Goedog and Waun Mawn would have looked very different, and indeed might not have been written at all.
So what does Foel Drygarn tell us about stone quarrying in Mynydd Preseli around 1,500 - 2,000 years after the date of the supposed stone extraction from the "bluestone monolith quarries"? We would expect the Foel Drygarn quarrying operation to have been more sophisticated, since the quarrymen would have had access to metal tools and maybe metal wedges too. But we find traces of quarrying work that was in essence very simple indeed. As far as we can see, the quarrymen took no slabs of rock from exposed rock faces -- they were only interested in taking small slabs from accumulations of scree. They concentrated on slabs and small blocks up to c 30 kg in weight, capable of being handled by two men. They were not interested in large boulders, and indeed left them behind as they cleared out smaller fragments from the scree slopes. The "lag concentrations" are obvious in places towards the eastern end of the quarrying complex. They left abundant traces of their stone extraction work -- interconnected pits and hollows, conical mounds of debris, ridges left between adjacent pits, abundant trackways, clean rock faces, and accumulations of unwanted boulders.
Reference:
Archive Collection: A.H.A. Hogg Foel Drygarn / Moel Trigarn Survey Plans (1968) RCAHMW document.
Here are rather poor copies of two of the maps:
.
Saturday, 25 July 2026
Prehistoric quarries in Pembrokeshire: three fantasies and one real but ignored
In the Foel Drygarn prehistoric quarry stone has been taken from at least four scree and blockfield locations associated with several different rock types.
In many posts on this blog I have referred to the disputes concerning the "monolith quarries" at three places: Carn Meini (Carn Menyn), Craig Rhosyfelin and Carn Goedog. The first of these was accepted as real by many archaeologists for the best part of a century, having been promoted in the writings of HH Thomas, Richard Atkinson and others and then "adopted" by Darvill and Wainwright in association with their "healing stones" hypothesis. It took a knock when Bevins and Ixer suggested that most of the spotted dolerites at Stonehenge had probably not come from there at all, but from Carn Goedog. Together with Parker Pearson, the two geologists have been instrumental since 2010 in suggesting that the petrology of bluestone monoliths and debitage at Stonehenge points to two major sources -- Carn Goedog for most spotted dolerites, and Rhosyfelin for the foliated rhyolites that occur in collections of fragments found in Stonehenge digs. (There are no Rhosyfelin standing stones.) They decided that there must have been quarries at those two sites, and of course, confirmed their ruling hypothesis by finding them, much to their own satisfaction.
As I have pointed out on multiple occasions on this blog, the evidence of actual prehistoric quarrying at those three sites does not withstand scrutiny. The "evidence" is so flimsy as to be laughable, and the conclusion has to be that the three sites display multiple features that are entirely consistent with the operation of natural processes over the course of many thousands of years of oscillating climate. That having been said, I would accept that the rock outcrops at Rhosyfelin might have been used by hunting parties over thousands of years for the provision of sharp-edged disposable cuttiong tools suitable for skinning animals and carving meat. Also, I would accept that the two spotted dolerite "quarrying" sites have been used by local farmers within the past 300 years for the provision of stone gateposts -- as indeed have other Preseli tors. And the deacons of the local nonconformist chapels have also taken many cartloads of dolerite blocks for the provision of "posh" facades on their chapels. (This was documented by my late friend Dyfed Elis Gruffydd in Welsh language publications.) The stones were NOT taken because they were supposed to be "sacred" or spiritually siognificant......
So let's get serious. There are three candidates for REAL prehistoric stone quarries in Mynydd Preseli, excluding abundant small pits and hollows all over the upland landscape that might well mark the positions of large stones used in local prehistoric stone settings. The locations are Bwlch Ungwr, Cnwc yr Hydd and Foel Drygarn. The small feature at Bwlch Ungwr, discovered by Hugh 360, is worthy of further investigation. I have mentioned in on this blog already. Much more impressive is the quarry pit on the summit of Cnwc yr Hydd, near Waun Mawn, and the string of linked pits on the slope below. I have given these plenty of space on this blog, for example here:
https://brian-mountainman.blogspot.com/2021/02/the-geology-of-waun-mawn.html
The Cnwc yr Hydd quarries are prominent features in the landscape, but in all the publications by Parker Pearson and his colleagues about Waun Mawn, they are completely ignored -- in spite of being located within a few hundred metres of their infamous "lost circle" of standing stones. Exposures show that these quarries have been used for the provision of slabs of meta-mudstone or foliated rhyolite suitable for domestic and farm buildings and stone walls. Transport of the slabs downhill in open countryside was very easy. My guess is that the quarries are all modern -- exploited within the past 300 years. There is nothing to suggest prehistoric use.
This leaves us with just one demonstrably prehistoric quarry -- at Foel Drygarn, close to the summit of the hill. In this case there is nothing to demonstrate modern use, and indeed it would not make much sense for local farmers to collect rubble from here, given its abundance across the countryside lower down.......
The quarrying activities have been quite extensive here -- there were at least four distinct areas of exploitation. These are shown in my various publications on this blog, for example:
https://brian-mountainman.blogspot.com/2017/04/foeldrygarn-prehistoric-quarries.html
https://brian-mountainman.blogspot.com/2018/10/the-prehistoric-quarries-at-foel-drygarn.html
The quarries are probably not Neolithic, since the main activities on this site were apparently concentrated in the Bronze Age (with the construction of three massive burial mounds) and in the Iron Age (with the construction of the fortified "village").
Nonetheless, there are some significant features of the Foel Drygarn quarrying complex:
1. The presence of suitable rock resources was a prime determinant in the location of the human features on the site -- namely three burial mounds, fortified embankments and a tribal village with maybe a few hundred inhabitants. This supports what Stephen Briggs has concluded from his studies of other prehistoric features elsewhere in Wales.
2. The targetted rock resources were small and manageable slabs of broken rhyolite, dolerite and meta mudstone. The quarrymen were NOT interested in megaliths or monoliths.
3. The slabs were almost all capable of being carried by one man or by two men working together.
4. The exploited rock resources were not rock faces but scree slopes and blockfields created by prolonged periglacial activity during the Quaternary.
5. All the collected rock slabs and blocks were collected within 60m or so of their places of use. Many were carried uphill for about 20m -- this effort was clearly preferable to the effort of carring in other rocks from external sources. In cost / benefit terms, the effort was worthwhile.
6. There are abundant and distinct physical traces of the quarrying activity -- extraction pits, waste mounds and ridges, and haulage trackways. In places so much scree has been removed that the rock face beneath has been exposed. There are no traces of tools, because none were needed.
7. I have estimated that c 14,000 tonnes of rock debris has been moved on the summit of Foel Drygarn. Some will have come from the immediate proximity of building or defensive work within the confines of the Iron Age village, but most must have come from the quarries.
8. Adjacent to one or two of the dolerite outcrops there are litters of large boulders and slabs (of bluestone monolith size!) that have simply been left behind while the quarrymen have carried away all of the smaller clasts for use in the burial mounds or fortified embankments.
So what are the lessons for those who insist that 80 Stonehenge bluestones were quarried from the living rock with the use of wedges and hammer stones, and transported all the way to Salisbury Plain thousands of years before Foel Drygarn was occupied and exploited?
There is a wonderful irony here. The one place where there is hard evidence of prehistoric stone quarrying is completely ignored by mainstream orthodoxy because it doesn't serve the Stonehenge origin story. At Foel Drygarn we see genuine, empirical evidence of prehistoric stone working in the Preseli region -- with the Bronze Age and later exploitation of local stone for highly practical, manageable architectural features. This system fits standard technological expectations perfectly:Local Scope: The slabs were extracted to build immediate, regional structures like the defensive walls of hillforts (such as Carn Alw or Carningli) or the burial cairns dotting the hills (such as Carn Briw or Foel Feddau).
Proportionate Scale: The stones were sized to be manageable by a local community working within the physical constraints of their immediate neighborhood. Common sense prevailed.
Visible Infrastructure: Unlike the alleged Stonehenge quarries, this practical exploitation leaves behind clear, unambiguous traces of extraction and use that do not require speculative ancient psychology to explain.
By completely sidelining this genuine prehistoric quarrying tradition, mainstream archaeologists expose their own confirmation bias. They ignore a real, visible, and logical stone-working evidence right under their noses while spending millions of pounds trying to prove that natural, frost-shattered rock faces at Carn Goedog and Craig Rhos-y-felin are high-tech Neolithic megalith production lines.
This selective blindness confirms that the promoters of the orthodox narrative are not interested in the actual, messy, practical reality of prehistoric stone use in Wales. They requires a pristine, monumental, long-distance fantasy to keep the "sacred transport" myth alive.............. How sad is that?
Wednesday, 22 July 2026
The collapse of the Preselite Myth: axe studies show that spotted dolerite was NEVER considered special or sacred
Stone axes come in many shapes and sizes. Those that were made of "bluestone" were strictly used as tools and were broken, re-fashioned sometimes, maybe sharpened, and then thrown away, having zero value or ritual significance. In contrast, stone items from elsewhere that were prized evolved over time into ritual or ceremonial items, in highly polished versions, and associated with high status. Such prized items are significantly missing from the British Preselite or bluestone axe catalogue, demonstrating that the very few bluestone axes that were made were throwaway items that had no value.
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I have been digging deeply into the geological and archaeological debitage (appropriate word) at Stonehenge, and am appalled by what I have discovered. So what is it? Nothing less than the smashed up and discredited remains of a grandiose and totally false narrative.
Let's start with the Wilsford G54 ceremonial battle axe. I have dealt with it briefly in another post, but on digging deeper I found this, from the English Heritage text:
"Material: Spotted dolerite... It is made of the same material as the bluestones at Stonehenge and may well have been fashioned from a piece of one of these stones."
As EH must know, this is a falsehood. The South-West Implement Petrology Group classified it in the County Register WILTS44 as an unspotted, medium-grained dolerite (diabase), lacking the characteristic macrophenocrysts of altered plagioclase feldspar that define the "spotted" Preselite (Group XIII) facies. While it is geochemically a dolerite within the broader Welsh/regional igneous spectra (Group XXIII), it is visually and texturally unspotted. It's also dated to the Bronze Age, not the Neolithic.
Back in 1999 (and in later years) Olwen Williams-Thorpe and others had already targetted museum pieces labelled visually as "Preselite" and had proved that multiple implements in Wiltshire collections —including unspotted variants like the Wilsford battle-axe—did not demonstrate a single provenance. Instead, they matched a wider, fragmented geological signature perfectly consistent with raw material collection from naturally scattered glacial drift deposits..
Williams-Thorpe, O., Potts, P.J., and Webb, P.C., 1999. Field-portable non-destructive X-ray fluorescence analysis of stone axe-heads. Journal of Archaeological Science, 26(2), pp. 215-237.
So EH is peddling a false narrative concerning the sacred or special nature of spotted dolerite at Stonehenge, as others have promoted the label "Preselite" for a special rock type from a specific place in West Wales and used for the manufacture of prized stone axes. This has all the makings of a very murky business. So where did the myth of the Preselite axes come from?
Group XIII axes are notably thick and heavy relative to their length. They feature broad, oval, or sub-rectangular cross-sections. Because the stone is prone to breaking if knapped too thin, craftspeople left them bulky. They were designed to rely on raw mass and momentum for chopping, clearing brush, or crushing, rather than acting as fine, sharp slicing blades. The overwhelming physical characteristic of nearly every recovered specimen is severe wear and tear. They look like tools that were used hard and pushed to their mechanical limits. The cutting edges are frequently uneven or lopsided, showing clear evidence of repeated, ad-hoc re-sharpening after the blade chipped or blunted on impact. The back end (poll) of the axe head often exhibits heavy crushing, splintering, and impact fractures. This indicates they were frequently used as heavy wedges and directly struck with wooden or stone mallets to split timber or pry open rock fissures. They are rarely found in pristine, perfect condition. They are typically recovered as broken fragments or completely exhausted, stunted stubs that were casually discarded into domestic rubbish pits or left scattered in agricultural topsoils once they could no longer be re-sharpened.
In short, the physical profile of a known Preselite axe is that of an ugly, rugged utilitarian tool. Its design prioritized survival against heavy mechanical shock, completely lacking the aesthetic artistry, glassy finish, and delicate proportions associated with prehistoric items of high value or spiritual status like the jadeite or Langdale axes which are found in great abundance.






