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...

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Tuesday, 16 September 2025

Glacial deposits and lead isotope signatures

In the worthy attempts to create a "lead isoscape map" for Great Britain, a map such as this one (from Booth et al, 2015) would be...

Thursday, 11 September 2025

The Mynydd Melyn moraine?

Out doing a bit of exploring today -- and I think I may have found the traces of a morainic ridge at around 900 ft on the southern flank...

How reliable is the BGS lead isoscape map?

The BGS lead "isoscape map" -- a crude sketch map dressed up as a piece of high precision cartography? Quite apart from the issu...

Wednesday, 10 September 2025

The Doniford gravels and the curse of the LGM bias

"Churned" deposits at the base of the gravel sequence at Doniford. At the base are Lias shale and limestone beds. therev isb e...

Monday, 8 September 2025

Rock surface exposure age dating using cosmogenic nuclides

Sample 1 (dolerite) -- showing three of the four faces Sample 1 -- reverse side, showing the smooth and iron-stained "secondary weathe...

Friday, 5 September 2025

Carling on erratic block shapes and evolution

Shap Pink Quarry -- in the centre of the original cliff exposure which appears to have been the main source for Shap Granite erratics. This...

Friday, 29 August 2025

Over 4 million, and climbing fast

I have only just noticed, but this blog has now gone past 4 million page views, with almost 100,000 page views on 28th August alone. That...

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About Me

BRIAN JOHN: I'm a native of Pembrokeshire. I read Geography at Oxford University prior to working in the Antarctic for a while and then I spent 11 years teaching geomorphology in Durham University. In 1976 I moved back to Wales with my wife and family to a smallholding -- where we set up two small businesses, my wife as a candle-maker and I as a writer and publisher. We lived at the same address for 48 years but have now downsized and live in the town of Newport.. We couldn't live anywhere more beautiful. We have two sons and two grandsons. Apart from my great interest in Stonehenge and the bluestones, and local prehistory and folk traditions, I also write fiction -- and have now written eight volumes in the Angel Mountain Saga -- all tales about a feisty and imperfect heroine called Martha Morgan, who lived on the flanks of Carningli -- the mountain which lies between my home and the north Pembrokeshire coast.

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