Western Interior Seaway

The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, and the North American Inland Sea) was a large inland sea that existed during the Mid-to-Late Cretaceous period, splitting the continent of North America into two landmasses, Laramidia to the west and Appalachia to the east. The ancient sea stretched from the Gulf of Mexico and through the middle of the modern-day countries of the United States and Canada, meeting with the Arctic Ocean to the north. At its largest, it was 2,500 feet (760 m) deep, 600 miles (970 km) wide and over 2,000 miles (3,200 km) long.

Read more about Western Interior Seaway:  Origin and Geology, Fauna

Famous quotes containing the words western and/or interior:

    trying to live in the terrible western world

    here where to love at all’s to be a politician, as to love a poem
    is pretentious,
    Frank O’Hara (1926–1966)

    It cannot but affect our philosophy favorably to be reminded of these shoals of migratory fishes, of salmon, shad, alewives, marsh-bankers, and others, which penetrate up the innumerable rivers of our coast in the spring, even to the interior lakes, their scales gleaming in the sun; and again, of the fry which in still greater numbers wend their way downward to the sea.
    Henry David Thoreau (1817–1862)