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 known 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.
Extraordinary fossils embedded in the banks of the Snake River
have been exposed by the carving action of the river. Planning is
underway to provide for continuing paleontological research and
for the display and interpretation of fossil specimens.
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(Source: National Park Service)