tag:blogger.com,1999:blog-1228690739485734684.post4941173080541179704..comments2024-03-28T14:00:12.372+00:00Comments on Stonehenge and the Ice Age: Check out the Mesolithic ForestBRIAN JOHNhttp://www.blogger.com/profile/00413447032454568083noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1228690739485734684.post-18193885450378238542012-03-13T16:34:25.633+00:002012-03-13T16:34:25.633+00:00Think we say the same, other than the tsunami woul...Think we say the same, other than the tsunami would not have been minor for people caught in its path. They would have been torn apart.<br /><br />So minor in a geological sense, catastrophic culturally.chris johnsonhttps://www.blogger.com/profile/16210890033354730381noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-91412212642282782582012-03-13T15:16:39.932+00:002012-03-13T15:16:39.932+00:00Chris -- Doggerland was flooded, like everywhere e...Chris -- Doggerland was flooded, like everywhere else around the shores of the UK, by the Holocene rise in sea level following deglaciation. There may have been minor events (including catastrophic ones) but this event was gradual and inevitable -- disturbed maybe in some details by eustatic / isostatic interactions. (That's because the northern part of the North Sea was depressed by glaciation, and then needed to recover afterwards by crustal uplift.)BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-51438068909832466452012-03-13T13:46:58.709+00:002012-03-13T13:46:58.709+00:00Minor details, Robert, in the way of comment.
The...Minor details, Robert, in the way of comment.<br /><br />The Doggerland flooding was not due to ice melting, rather to an undersea shift (earth quake/landslide) off Norway which gave rise to a Tsunami type effect. It happened suddenly and with catastrophic effect. Not sure how this would have effected West Wales as the net sea level was not influenced beyond the continuing glacial melting that eventually separated UK and Europe definitively.<br /><br />The disconnect between Ireland and Wales happened earlier than 10k BC, I think, the last connection being in the North. Thus some people argue for a North to South colonization of Ireland rather than South to North. Still I puzzle about the folk memory in the Mabinogian that refers to walking between Ireland to Wales - how ancient is that?<br /><br />I think Brian's input fits my understanding. The general sea level reached approximately current level around 2500 BC.chris johnsonhttps://www.blogger.com/profile/16210890033354730381noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-42106252488036767992012-03-12T13:34:41.268+00:002012-03-12T13:34:41.268+00:00What is interesting is the carbon dates - 7000BP t...What is interesting is the carbon dates - 7000BP to 4500BP, which is when the sea level finally flooded this area after the great Ice Age melt like doggerland.<br /><br />The reality of course is that from sea level data this was dry land for many tens of thousands of years. Covered in ice during the last major ice age, tundra thereafter and then finally green and pleasant land with trees as Wales and Ireland did not exist, as this area was part of a single land mass until 12,000BP.<br /><br />Consequently, we should get RC dating going back a lot further - but we don't! <br /><br />This shows that either it is only the last objects in prehistory of an ancient area that are left buried or swamped that we seem to find - rather than a staggered complete history OR that the separation was much later and the Sea level data is consequently wrong!<br /><br />RJLBobhttps://www.blogger.com/profile/16886732338349957214noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-14383121084892443182012-03-11T20:52:58.970+00:002012-03-11T20:52:58.970+00:00No -- the wooded area offshore must have spanned s...No -- the wooded area offshore must have spanned several thousand years, dating from a time when the climate was warm enough for extensive woodland growth after the onset of the Holocene, right up to the time when a particular area of woodland was finally overwhelmed by a rising sea level. There are lots of radiocarbon dates around 6000 BP - 4500 BP -- but others around 7,000 BP. At lower levels -- probably in areas now permanently submerged -- there will be forests that were older and were submerged earlier.BRIAN JOHNhttps://www.blogger.com/profile/00413447032454568083noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-75610662206965283082012-03-11T13:38:32.474+00:002012-03-11T13:38:32.474+00:00Brian,
Is 5000 BC the exact date do you think?Brian,<br />Is 5000 BC the exact date do you think?chris johnsonhttps://www.blogger.com/profile/16210890033354730381noreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-78072715317087748722012-03-09T21:09:30.288+00:002012-03-09T21:09:30.288+00:00Any further news, identification-wise, as to the e...Any further news, identification-wise, as to the erratic you observed in the Newport estuary (previous Post in February)? Have you sent your samples off to a friendly rock specialist?Tony Hnoreply@blogger.comtag:blogger.com,1999:blog-1228690739485734684.post-9377552155784286132012-03-09T15:00:08.459+00:002012-03-09T15:00:08.459+00:00Fascinating. I go to Amroth (near Tenby) where fo...Fascinating. I go to Amroth (near Tenby) where forest remains are visible for a long distance at low tide.chris johnsonhttps://www.blogger.com/profile/16210890033354730381noreply@blogger.com