Appalachia (landmass) in the context of "Laramidia"

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👉 Appalachia (landmass) in the context of Laramidia

Laramidia was an island continent that existed during the Late Cretaceous period (99.6–66 Ma), when the Western Interior Seaway split the continent of North America in two. In the Mesozoic era, Laramidia was an island land mass separated from Appalachia to the east by the Western Interior Seaway. It was home to many dinosaurs including ankylosaurs, ceratopsians, and tyrannosaurs. The seaway eventually shrank, split across the Dakotas, and retreated toward the Gulf of Mexico and the Hudson Bay. The masses joined, forming the continent of North America.

Laramidia is named after the Laramide orogeny. The name was coined by J. David Archibald in 1996.

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Appalachia (landmass) in the context of Western Interior Seaway

The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that existed roughly over the present-day Great Plains of North America, splitting the continent into two landmasses, Laramidia to the west and Appalachia to the east. The ancient sea, which existed for 34 million years from the early Late Cretaceous (100 Ma) to the earliest Paleocene (66 Ma), connected the Gulf of Mexico (then a marginal sea of the Central American Seaway) to the Arctic Ocean. At its largest extent, the seaway was 2,500 ft (760 m) deep, 600 mi (970 km) wide and over 2,000 mi (3,200 km) long.

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LINKED FROM (PARENTS)
← Western Interior Seaway ← Laramidia
LINKS TO (CHILDREN)