About 22,OOO years ago (yesterday in geologic time) two large continental ice sheets covered a great deal of North America. The larger of the two, the Laurentinne Ice Sheet, a section of wich covered what is now Connecticut. The twin sheet, in the western part of North America was the Cordilleran.
These two ice sheets and other glaciers locked up huge volumes of water and as a conswquence, global sea level was 120 meters lower than it is today. Large expansions of the continental shelf on the west coast were exposed, creating land bridges permitting humans, and plants tomigrate for the first time into North America.
This two day course will cover the early interpretations of the formations that were created by these ice sheets and the efforts to explain them. Many prominent scientists including Charles Darwin and Louis Agassiz were involved in interpretting what mechanisms created the unusual land features they created.
On Saturday, May 6, a three hour field trip to various areas of the Northwest corner of Connecticut will reveal formations still existing that resulted from the activity of these ice sheets. Such glacial features as drumlins, eskers, kettle ponds, glacial erratics and striated and polished bedrock provide evidence of their presence on the North American continent.
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