Western Interior Seaway
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The Western Interior Seaway (also called the Cretaceous Seaway , the Niobraran Sea , the North American Inland Sea , and the Western Interior Sea ) was a large inland sea that split the continent of North America into two landmasses. The ancient sea, which existed from the early Late Cretaceous (100 million years ago) to the earliest Paleocene (66 Ma), connected the Gulf of Mexico, through the United States and Canada, to the Arctic Ocean. The two land masses it created were Laramidia to the west and Appalachia to the east. At its largest extent, it was 2,500 feet (760 m) deep, 600 miles (970 km) wide and over 2,000 miles (3,200 km) long.
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- Slug: western-interior-seaway
- Total Views: 327
- Added: Jul 20, 2024