The range of the muskox, now found only in the Arctic, extended to Mexico. From Virginia coast, about 8,000 to 10,000 years old. Fishermen dredged a giant mastodon tooth from the Atlantic Ocean, off New Jersey. To find evidence of a land mammal in this location indicates that sea level was much lower then and dry land extended far east into what is now the Atlantic Ocean. In periods of cold climate ocean levels drop as water is locked into glaciers.
Walruses live only in frigid waters.
During the last advance of ice, walruses swam as far south as the coast of Virginia. For walruses to have been there, the climate must have been colder than it is today. Design and construction by Knauer Communications .