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History of Vermont

The geologic history of Vermont begins more than 450 million years ago during the Cambrian and Devonian periods. Human history of Native American settlement can be divided into the hunter-gatherer Archaic Period, from c. 7000–1000 BC, and the sedentary Woodland Period, from c. 1000 BC to AD 1600. Vermont was admitted to the United States as the fourteenth state in 1791 after a brief period of sovereignty following the American Revolutionary War. Vermont experienced rising abolitionist sentiment and subsequently fought on the Union side of the American Civil War. Geological and marine history Vermont was covered with shallow seas periodically from the Cambrian to Devonian periods. Most of the sedimentary rocks laid down in these seas were deformed by mountain-building. Fossils, however, are common in the Lake Champlain region. Lower areas of western Vermont were flooded again, as part of the St. Lawrence Valley and Champlain Valley by Lake Vermont whose northern boundary followed the melting glacier at the end of the last ice age, until it reached the ocean. This was replaced by Lake Vermont and the Champlain Sea, when the land had not yet rebounded from the weight of the glaciers which were sometimes 2 miles thick. Shells of salt-water mollusks, along with the bones of beluga whales, have been found in the Lake Champlain region. Lake Vermont connected to a glacial western lake near what is now the Great Lakes. They allowed western fish to enter the state, which is why Vermont has more native species than any other New England State, 78. About half of these are western in origin. Little is known of the pre-Columbian history of Vermont. Between 8500 and 7000 BC, glacial activity created the saltwater Champlain Sea. This event caused lamprey, Atlantic salmon, and rainbow smelt to become landlocked.