• The Agate Fossil Hills where mammal fossils were excavated in the early 1900's

    Agate Fossil Beds

    National Monument Nebraska

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Fossils and Much, Much More

During the 1890s, scientists rediscovered what the Lakota Sioux already knew - bones preserved in one of the most complete Miocene Epoch mammal sites in the world.

Yet, this place called "Agate" is a landscape that reflects many players – from early animals roaming the valleys and hills, to tribal nations calling the High Plains home, to explorers passing through or settling in the American West.

Did You Know?

Dinohyus skull in diorama

One of the more menacing beasts found in the quarries at Agate Fossil Beds was the Dinohyus. This big-toothed animal was a scavenger credited with tearing apart the rhino skeletons that ended up in the waterhole bonebed. Although not related to the pig family, his nickname was “Terrible Pig.” More...