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Posted on 01/05/2007 4:42:11 PM PST by blam
Me too!! Too bad he also said he would become a Christian when he turned 80 years old. Don't think he made it. Uh, bio says he didn't.
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Added tsunami to the keywords. :') Thanks for the others, and for this fascinating topic.
"...Shouldn't evidence of that tsunami still be present in modern England and Scotland?
Has erosion altered the landscape that much in 8100 years to erase all evidence of deposits?..."
Sea level may have been lower then...some of the evidence (scouring, erosion scars, etc) may be underwater at present.
I did a short paper on my interpretation, as a marine navigator, of a Spanish ship wreck on the Oregon Coast.
Old charted anchor bearings did not match the waters of the bay until I matched what the bay was supposed to look like 500 years earlier. Thanks for the info from Oregon State University Hatfield Marine Science Center.
I probably should post a "comment" but this tsunami was caused by a combination of factors: 1 - since the last Ice Age the oceans have risen 150 metres (450')... yes... and toward the end of that Atlantic Ocean water finally made it over a ridge that separated the warm Atlantic from the cold Arctic water off the coast of Norway 2 - much of the extended coast of Norway, now underwater as part of its "continental shelf," was frozen tundra and when it was submerged it started to thaw. The warm Atlantic water hitting it accelerated that thaw 3 - frozen in the tundra (just like in Siberia and northern Canada now) were large amounts of methane clathrate, a form of methane that can expand with explosive rapidity... like "burps" 4 - laid over a bed of methane clathrate was a huge post-glacial deposit of gravel, mud and stone... perched at the edge of the deep ocean.
A big methane "burp" somehow got this huge mass moving downhill, and the largest landslide in known history spread down the slope and across the deep ocean floor - displacing an enomous amount of water and causing tsunamis in all the adjacent coastal areas.
Read all about it (and see the video) at http://www.fettes.com/Shetland/tsunami%20deposits.htm
Excellent addition, thanks.
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