Champlain Sea
Quick Summary
The Champlain Sea was a large body of saltwater that covered parts of Quebec and Ontario, Canada, during the last glacial period. As the glaciers receded, the sea drained, leaving behind a flat plain that is now the Great LakesāSt. Lawrence lowlands. This region is known for its fertile land, industrial activity, and high population density.1
Lake Champlain, named after French explorer Samuel de Champlain, is a significant lake in this region, forming part of the border between Vermont and New York. It has played a role in historical conflicts, including the French and Indian Wars, the American Revolution, and the War of 1812.2
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CanadaThe Great LakesāSt. Lawrence lowlandsā¦ocean water, known as the Champlain Sea, which produced a very flat plain. The level plain is broken by the seven Monteregian Hills near Montreal. The westernmost of these is Mont-Royal (Mount Royal) in Montreal, about 820 feet (250 metres) high.
Read Moreā¦ocean water, known as the Champlain Sea, which produced a very flat plain. The level plain is broken by the seven Monteregian Hills near Montreal. The westernmost of these is Mont-Royal (Mount Royal) in Montreal, about 820 feet (250 metres) high.
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St. Lawrence RiverGeologyā¦they were replaced by the Champlain Sea, which flooded the depression from about 13,000 to 9,500 years ago. A subsequent slight uplifting of the continent was enough to expel this arm of the ocean, and about 6,000 years ago a residual riverlike watercourseāthe St. Lawrenceāwas established.
Read Moreā¦they were replaced by the Champlain Sea, which flooded the depression from about 13,000 to 9,500 years ago. A subsequent slight uplifting of the continent was enough to expel this arm of the ocean, and about 6,000 years ago a residual riverlike watercourseāthe St. Lawrenceāwas established.
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