Stone No 4 appears to be different from the others -- and I wonder if it is a diorite? I'd like to take a look at it in the company of an expert geologist, when the sun is shining!
It has the same greenish colouring, but the texture is much coarser, and there don't seem to be obvious phenocrysts -- just a jumble of minerals, many of which have dark elongated crystals..... opinions please?
And below is a photo of some of the beach pebbles that are scattered about in abundance all over the beach to the north of the Sleek Stone.
Some of these (the greenish and bluish speckled pebbles) look familiar -- and are related to the Giant Erratics -- but we also have a pebble of Cambrian red sandstone here, and the larger pebble to the right of it looks as if it might be gabbro from St David's Head.
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...
THE BOOK
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
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
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