tag:blogger.com,1999:blog-1228690739485734684.post4180611697027034720..comments2024-03-28T22:13:17.139+00:00Comments on Stonehenge and the Ice Age: Bluestone fragments "not from South Wales"BRIAN JOHNhttp://www.blogger.com/profile/00413447032454568083noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1228690739485734684.post-29284792662820044462010-12-11T17:14:48.555+00:002010-12-11T17:14:48.555+00:00Less Brynberian more Beth din.
GCU In two minds.Less Brynberian more Beth din.<br />GCU In two minds.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-31725809630982208952010-12-07T16:15:08.861+00:002010-12-07T16:15:08.861+00:00Look forward to seeing it in print. Rhyolite / sh...Look forward to seeing it in print. Rhyolite / shymolite? Is that the Brynberian stuff, or something else again?BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-45168494926987978162010-12-07T16:04:07.285+00:002010-12-07T16:04:07.285+00:00Most of the test pit material was 19th 20th cent.
...Most of the test pit material was 19th 20th cent.<br />But there are a few South Wales echte bluestones. 5/6?<br />The detailed results are being written up.<br />GCU In two minds.<br />Rhyolite/shymolite 100s of bits high hundreds.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-27723737265378465292010-12-06T17:25:56.341+00:002010-12-06T17:25:56.341+00:00This isn't really news -- the info has been ar...This isn't really news -- the info has been around for a while. There's lots of rhyolite; have a look at my list here from 9th Nov:<br />http://brian-mountainman.blogspot.com/2010/11/more-than-30-different-bluestone.html<br />No quarries, but lots of different sources -- as you would expect with a collection of glacial erratics.<br /><br />Periglacial marks? If they are periglacial, they have nothing to do with glacier ice.<br /><br />The form of the British ice sheet is now pretty well known for the Devensian -- see my post dated 6 December 2009. Jim Scourse's work suggests that the Devensaian ice reached much further south -- as far as the Scilly Isles. He may well be right..... but I don't like the naff shape of his glacier, which seems to me to defy glaciological principles..BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-82693733477079847542010-12-06T17:10:08.977+00:002010-12-06T17:10:08.977+00:00That's very interesting Brian!!
Is any of the...That's very interesting Brian!!<br /><br />Is any of the Stonehenge circle 'remains' - Rhyolite, or has no-one looked that closely??<br /><br />So where are they from??- one would imagine that if the ice sheet 'drop off' theory is correct it was two different periglacials? or could it be two different quarries!<br /><br />Does the fact that theses are 'chips' show that these may have been 'worked' and are not whole?<br /><br />I remember seeing periglacial marks in an excavation in The Avenue in a NE direction - which indicated the Anglian Ice sheet came from that direction - so is there a bluestone crop in that direction?<br /><br />If your theory is correct then the Devensian must have come in from the NW - ie wales - but the isostatic centre is Scotland - which would have pushed them to Cornwall??<br /><br />RJLRobert Langdonhttp://www.prehistoric-britain.co.uknoreply@blogger.com