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John Day Fossil Beds National MonumentImage of Sheep Rock and a rainbow.
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John Day Fossil Beds National Monument
The Fossil Record
Image of three toed horses.  

Did You Know?
The first horses evolved in North America 50 million years ago, and at least 14 different genera have been found at the John Day Fossil Beds National Monument in Oregon.

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Last Updated: September 19, 2006 at 19:28 EST