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Search results with tag "Great ice age"
U.S. Department of the Interior / U.S. Geological Survey ...
pubs.usgs.govThe Great Ice Age by Louis L. Ray The Great Ice Age, a recent chapter in the Earth's history, was a period of recurring widespread glaciations. During the Pleistocene Epoch of the geologic time scale, which began about a million or more years ago, mountain glaciers formed on …