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Posted by / 03-Aug-2020 13:24

Elsterian glacial period dating

In Eurasia, large lakes developed as a result of the runoff from the glaciers.Rivers were larger, had a more copious flow, and were braided.The Cordilleran ice sheet covered the North American northwest; the east was covered by the Laurentide.The Fenno-Scandian ice sheet rested on north Europe, including Great Britain; the Alpine ice sheet on the Alps.The mean annual temperature at the edge of the ice was −6°C; at the edge of the permafrost, 0°C.Each glacial advance tied up huge volumes of water in continental ice sheets 1500-3000 meters (m) thick, resulting in temporary sea level drops of 100 m or more over the entire surface of the Earth.

The Andes were covered, in the south by the Patagonian ice cap. The current decaying glaciers of Mount Kenya, Mount Kilimanjaro, and the Ruwenzori Range in east and central Africa were larger.It is estimated that, at maximum glacial extent, 30 percent of the Earth's surface was covered by ice.In addition, a zone of permafrost stretched southward from the edge of the glacial sheet, a few hundred kilometers in North America, and several hundred in Eurasia.The epoch was intended to cover the recent period of repeated glaciations; however, the start was set too late and some early cooling and glaciation are now believed to be in the Gelasian stage at end of the Pliocene.Therefore, some climatologists and geologists would prefer a start date of around 2.58 million years BP (Clague 2006).

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