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Laurentide Ice Sheet, principal glacial cover of North America during the Pleistocene Epoch (about 2,600,000 to 11,700 years ago). At its maximum extent it spread as far south as latitude 37° N and covered an area of more than 13,000,000 square km (5,000,000 square miles).
At around 13,000 14C y.a., retreat of the the western and eastern North American ice sheets exposed an 'ice free' corridor linking Alaska to the land to the south. The Bering Straits at this time also remained dry land.
This ice sheet was the primary feature of the Pleistocene epoch in North America, commonly referred to as the ice age. During the Pre-Illinoian Stage, the Laurentide Ice Sheet extended as far south as the Missouri and Ohio River valleys.
16 sie 2019 · These spatial patterns in Late Pleistocene ice extent suggest that glaciation may be initiated in the Pacific region, before spreading to the North Atlantic region.
14 wrz 2018 · Introduction. Often occurring over geologically short (<10 4 years) time scales, large-scale paleo-geographic changes related to Pleistocene ice sheets significantly affected the evolution and...
Detailed Description. Map of North America showing the extent of Late Pleistocene glaciation (modified after Pielou, 1991).
The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing.
