tag:blogger.com,1999:blog-1228690739485734684.post6824311326134320500..comments2024-03-28T22:13:17.139+00:00Comments on Stonehenge and the Ice Age: DoggerlandBRIAN JOHNhttp://www.blogger.com/profile/00413447032454568083noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1228690739485734684.post-29687307904233469482010-12-10T16:29:48.649+00:002010-12-10T16:29:48.649+00:00The drill core data may be available from the BGS....The drill core data may be available from the BGS.<br />GCU. In two mindsAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-62369428178320118232010-12-08T17:29:51.016+00:002010-12-08T17:29:51.016+00:00Regarding the "weight" of the Devensian ...Regarding the "weight" of the Devensian British - Irish ice sheet, current estimations are based on the "norm" as follows-- a load of 3,000m of ice will result in around 1,000m of crustal depression. That seems to hold true for Scandinavia, Greenland, the Laurentide Ice sheet, and Antarctica. The strandline studies that I used to do in the good old days seemed to confirm that this was broadly correct. What we don't know yet for the UK is exactly where the ice surface contours were -- but the Aberystwyth models show, as you would expect, greatly differing ice thicknesses across the UK, because existing topography (mountains and lowlands etc) is so complex. The bright fellows who are studying all of this will get there in the end.........<br /><br />Rivers in Doggerland at -60m? As I understand it, these are not necessarily Holocene rivers -- parts of that submerged landscape might be very old indeed, going back several glaciations and interglacials.BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-51302682200037600252010-12-08T10:22:18.554+00:002010-12-08T10:22:18.554+00:00Good post Brian - I actually agree with you!
If w...Good post Brian - I actually agree with you!<br /><br />If we accept the isostatic variations are accurate - the the Devensian glaciation must have either been larger or small but heavier than current estimations.<br /><br />Although looking at the marine maps of the area - they show that doggerland is only 15m deep at the top of the hills - were they have found rivers its more 60m - hence my skepticism of the 'traditional' sea level model.<br /><br />RJLRobert Langdonhttp://www.prehistoric-britain.co.uknoreply@blogger.com