tag:blogger.com,1999:blog-1228690739485734684.post9458673733870789..comments2024-03-28T14:00:12.372+00:00Comments on Stonehenge and the Ice Age: Irish Sea Glacier Lobe v Celtic Sea Piedmont GlacierBRIAN JOHNhttp://www.blogger.com/profile/00413447032454568083noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-1228690739485734684.post-74004330695511543442011-11-08T16:18:12.110+00:002011-11-08T16:18:12.110+00:00Thanks for this, CG:
Hi Brian - you should get ac...Thanks for this, CG:<br /><br />Hi Brian - you should get access to those papers about the nearshore Celtic Sea shelf at http://www.ucd.ie/gsi/pdf/37-2/celtic.pdf<br />and<br />http://www.ucc.ie/research/crc/publications/journals/Irish_Geog_37_2_2004_Waterford_Harb.pdf<br /><br />For a beautiful multibeam image of the Waterford Harbour palaeochannel (a kml file of 85 MB from the Geol Survey of Ireland for use in Google Earth...better than the earlier imagery in the papers), go to<br />http://spatial.dcenr.gov.ie/Google/Survey2007/INFOMAR%20Hydrographic%20Survey%20CV07_02_Waterford.kmz<br /><br />For papers on the age of the Pleistocene deposits along the south coast of Ireland (beyond which these now-submerged systems must have been active), see<br /><br />DOI:10.1080/00750779709478635<br /><br />and (for a recent update)<br /><br />doi:10.1016/j.quascirev.2010.01.011BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-23564343491779429582011-11-07T12:03:26.312+00:002011-11-07T12:03:26.312+00:00Thanks Anon -- those two papers look very interest...Thanks Anon -- those two papers look very interesting. Didn't know about them -- sorry I can't get at them. Any chance of PDF copies?BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-33883276465636698212011-11-07T11:52:12.264+00:002011-11-07T11:52:12.264+00:00...for evidence of glaciation and glaciofluvial di......for evidence of glaciation and glaciofluvial discharges on the continental shelf close to the present Irish coast see http://dx.doi.org/10.1080/00750770209555800 and http://dx.doi.org/10.1080/00750770409555839...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-24045863593999775062011-09-14T12:24:12.731+01:002011-09-14T12:24:12.731+01:00Thanks Henry -- yes, you are right. Should have e...Thanks Henry -- yes, you are right. Should have examined the piece more carefully. So if these really are eskers they should be able to see typical fluvioglacial materials beneath these other little transverse ridges. And I'm not entirely happy about the mechanisms by which De Geer moraines would be "dropped onto" eskers in the fashion suggested.<br /><br />But if they have got this right, that means grounded ice right down to the -200m contour -- which gets very interesting indeed!BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-38228006357272260762011-09-14T12:16:40.650+01:002011-09-14T12:16:40.650+01:00I think they have been assumed to be Devensian bas...I think they have been assumed to be Devensian based on relative stratigraphy and the distribution of till observed in cores around the basin. No absolute dates yet, though this may change in the next few years.<br />Rather than being streamlined, I think the interpretation is that they are depositional features - eskers overlain by de Geer moraines as the ice retreated.<br />Have emailed you another couple of relevant papers referred to in the presentation.Henry Pattonhttp://henrypatton.orgnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-12827438620119851572011-09-13T21:59:11.338+01:002011-09-13T21:59:11.338+01:00The title of that presentation:
GLAMARous RIDGES ...The title of that presentation:<br /><br />GLAMARous RIDGES : exploring glacial landscapes in the Celtic Sea<br />by<br />Daniel Praeg1, Stephen McCarron2, Paul Goldsberry2, Martyn Stoker3BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-87713886469384397942011-09-13T16:10:15.251+01:002011-09-13T16:10:15.251+01:00Interesting stuff, Henry! What I find interesting...Interesting stuff, Henry! What I find interesting is the question of whether these really are streamlined bedforms -- how hard is rhe evidence for that? And what can we assume about age? Are these necessarily Devensian features? Could they be much older -- dating from the Anglian or GBG? Did these guys give any verbal evidence relating to this?BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-31188283420080499322011-09-13T15:48:40.640+01:002011-09-13T15:48:40.640+01:00I think you will find this presentation interestin...I think you will find <a href="http://www.gsi.ie/NR/rdonlyres/BA68C129-F656-4C01-A5F2-C57B5D60C1D7/0/1530_Praeg_al_Geoscience2010.pdf" rel="nofollow">this presentation</a> interesting, showing multibeam data from the Celtic Sea shelf. The maximum extent is seemingly once open again...<br />Praeg did a similar presentation at this year's INQUA conference.Henry Pattonhttp://henrypatton.orgnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-80736890904259464442011-09-01T05:25:29.303+01:002011-09-01T05:25:29.303+01:00http://www.bbc.co.uk/news/uk-14733535
over to you...http://www.bbc.co.uk/news/uk-14733535 <br />over to you for comment.<br />PeteAnonymousnoreply@blogger.com