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Moderated by : Andy B , TimPrevett , coldrum , Klingon , MickM , TheCaptain , bat400 , davidmorgan , Runemage , SolarMegalith , sem
The Megalithic Portal and Megalith Map : Index >>
Stones Forum >> Submerged landscapes
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| Author |
Submerged landscapes |
Thorgrim
Joined:
25-06-2003
Messages: 794
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|  Posted 01-08-2005 at 08:40
The disappointing series "Coast" perked up last night with a good look at the copper mines of the Great Orme. However, what really intrigued me was the submarine forest in Cardigan Bay and in the next programme I believe they will be looking at the Mesolithic footprints in Morecambe Bay or off the Formby shore. An earlier programme had featured the Paviland Cave and indicated that although now only approachable at low tide, when inhabited it had been 30 miles or so from the sea. I know about submarine Scilly and also the submerged forests in Mounts Bay, the Solent and off Hartlepool, but I wondered if anyone knew of any attempts to map similar sites and detail earlier coastlines. When told that sea levels were 20 or even 30 metres lower than today, we only seem to consider the vertical difference. Depending on the gradient of the land, every vertical metre must correspond to 6, 10, 30 or even more horizontal metres of sloping decline. Settlements on the shores of these ancient coastlines will now be deep beneath the sea. Can anyone point me in the right direction to find out more about ancient coastlines and submerged landscapes?
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sem
Joined:
12-11-2003
Messages: 1704
from Bridgend,S.Wales
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| Posted 02-08-2005 at 19:01
Hi Thor
I remember a news article on the Portal about mapping the floor of the N.Sea as it was during glaciation and (if my drink-wrecked memory is correct) remember seeing a link to it.
As re Pavilland, a series on TV a while ago (which one I forget,probably Welsh TV) said that during the last ice-age (15500yrs ago) it was 70miles from the sea.
Interestingly there was also a period 12900-11500 BCE, where the temperature dropped by about 15deg C, so areas of previous inundation may have been re-enhabited. One of my dreams has been to find evidence of this in Milford Haven, W Wales, which would have been above sea level during this period. Unfortunately it is at a river mouth and so very silted up. Plus our club only dives there when conditions elsewhere are awful.
If yuo find info on the sea level then, please post a link as I would be very interested.
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Thorgrim
Joined:
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| Posted 02-08-2005 at 22:20
Sorry Sem, I have no information about the North Wales submerged coastline. A good start would be to look at your local marine charts and note the marine contours.
Interesting overall impression of the now submerged landscape around Britain can be seen here:
http://www.ex.ac.uk/archaeology/rdogger.html
Yes, mapping of the North Sea will probably be the most revealing as this map of coastal settlements suggests and hints at more to be found.. http://www.bmapa.org/pdf/meso.pdf
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Anonymous
User not Registered | Posted 07-08-2005 at 20:00
Hi - living on the Orkney Islands, I am well aware of the closeness of water and the submergence of land. I previously lived in North Wales, where the treestumps often show up at low tide.
I am off to explore your weblinks now! Please keep in touch - fascinating subject!
Try contacting Caroline Wickham Jones (Mesolithic archaeologist) who has done much recent investigation of coastal sttlements, and may be able to help you.
What about Dogger Bank, in the North Sea?
Can anyone actually clarify the retreating of the ice and subsequent sea level rise, together with the rebounding of Scotland after removal of the ice? And what of erosion.
Maybe the underwater archaeology folk can help?
Best wishes from Malcolm (Five Senses)null
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Thorgrim
Joined:
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| Posted 07-08-2005 at 20:55
Whole of of interesting stuff on Orkney, Doggerland and other sites here:
http://www.offshore-sea.org.uk/site/scripts/downloads.php?categoryID=37
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Thorgrim
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| Posted 17-11-2005 at 20:46
Hi Sem - following your request for information on submergence of land off the present coastline of Wales - take a look at this download:
http://www.offshore-sea.org.uk/consultations/SEA_6/SEA6_Archaeology_NCF.pdf
Quote:
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On 2005-08-02 19:01, sem wrote:
Hi Thor
I remember a news article on the Portal about mapping the floor of the N.Sea as it was during glaciation and (if my drink-wrecked memory is correct) remember seeing a link to it.
As re Pavilland, a series on TV a while ago (which one I forget,probably Welsh TV) said that during the last ice-age (15500yrs ago) it was 70miles from the sea.
Interestingly there was also a period 12900-11500 BCE, where the temperature dropped by about 15deg C, so areas of previous inundation may have been re-enhabited. One of my dreams has been to find evidence of this in Milford Haven, W Wales, which would have been above sea level during this period. Unfortunately it is at a river mouth and so very silted up. Plus our club only dives there when conditions elsewhere are awful.
If yuo find info on the sea level then, please post a link as I would be very interested.
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Anonymous
User not Registered | Posted 19-11-2005 at 11:52
You may also enjoy the current debate on the subject over on the Modern Antiquarian
http://www.themodernantiquarian.com/forum/?thread=28196
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sem
Joined:
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Messages: 1704
from Bridgend,S.Wales
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| Posted 26-11-2005 at 10:48
Thank you for the SEA6 info Thorgrim. It makes a fascinating read and I would recomend it to anyone with an interest in prehistory.
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