Author Topic: G.WMS: PAST SEA LEVELS  (Read 654 times)

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Re: G.WMS: PAST SEA LEVELS
« on: September 14, 2021, 02:18:00 pm »
Ice Age Anomalies [Journals] [SIS Workshop]
_From: SIS Chronology and Catastrophism Workshop 2005:3 (October 2005) Home | Issue Contents IN PASSING Ice Age Anomalies Phillip Clapham Michael Collins of the Texas Archaeological Research Laboratory at the University of Texas in Austin has noted striking similarities between projectile points, point preforms, blades and cores, burins and small engraved stones belonging to the Clovis culture in North America and the flint assemblage of the Solutrean culture in Late Palaeolithic western Europe. [1 ] http://www.centrefirstamericans.com/ Unable to find clear antecedents for Clovis flint work in NE Asia has meant that some archaeologists, including Collins, are beginning to look at Late Pleistocene western Europe – and
... a change in the axis of rotation, coincided with the end of the Ice Age/Pleistocene, volcanism along the Mid-Atlantic Ridge may have caused the plates either side to move – to slide on the gooey mantle material below. On that scenario the Atlantic would have widened by an unspecified degree in a matter of days or weeks. Gordon Williams, in an article in C&C Workshop 1994:1 (see also the SIS website at www.knowledge.co.uk/sis ), suggested the crust may have crumpled, especially in the Caribbean region and the SE United States, at the end of the Pleistocene – as a result of a shift in the geographical position of the North Pole. The Atlantic began life as a rift valley system and has expanded in width on multiple occasions. A shallow sea existed in the Atlantic basin during the Cretaceous Period for example and the Alvarez asteroid impact probably would have made it expand quickly – and likewise geological changes in the the Miocene, Oligocene, and the Eocene. Hence, there was probably limited expansion in the width of the Atlantic at the end of the Pleistocene. What is remarkable is that eels have adapted on each widening episode – by swimming that much further from their nursery to the continents surrounding the Atlantic basin. Hence, the awe expressed by modern biologists when they discovered the immense distances involved in the eel life cycle. Crustal distortion may mean the extremities of NW Europe were once closer to NE America – in a sort of skew whiff manner. This would make the idea of a shift in the polar ice cap more feasible as at the moment the two regions appear to be too far apart. In addition, crustal distortion along the lines of Paul Dunbavin [2 ] is also worth considering as there were significant changes in sea level at the end of the Pleistocene. Where the ocean now exists dry land may once have prevailed. The continental shelf systems of both North America and NW Europe are large and are thought to have been engulfed at this point in time. Volcanism on the ridge would have played a role in combination with plate movement and crustal dynamics. Looking at a map of the ocean floor the small dot of Rockall seems to have been a much larger island, and at an even earlier period it was attached to the continental shelf system surrounding NW Europe. The same might be said of the Porcupine Bank off the west coast of Ireland and on the other side of the Atlantic there is an extensive continental shelf system around Newfoundland, including the Grand