![America's national monuments : the legacy of the Great Plains. [Volume 1], Geologic wonders of the northern plains: Agate Fossil Beds National Monument](https://illumira-media.s3.amazonaws.com/njcore_21353/tn/njcore_21353-5d0542b9af076428e5b665800d1252df95a62517-medium.jpg)
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America's national monuments : the legacy of the Great Plains. [Volume 1], Geologic wonders of the northern plains: Agate Fossil Beds National Monument
The geology of the Great Plains is a product of long epochs of sedimentary buildup followed by equally long epochs of erosion. The result today is a dramatic landscape of bluffs, pinnacles and badlands that contain the rich story of ancient sea crea...