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Hagerman Fossil Beds NM contains the largest concentration of Hagerman Horse fossils in North America. The Monument is Internationally significant because it protects the world's richest know fossil deposits from a time period called the late Pliocene epoch, 3.5 million years ago. These plants and animals represent the last glimpse of time that existed before the Ice Age, and the earliest appearances of modern flora and fauna.Desginations
November 18, 1988 - National Monument
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