![America's national monuments : the legacy of the Great Plains. [Volume 1], Geologic wonders of the northern plains: Devils Tower National Monument](https://illumira-media.s3.amazonaws.com/njcore_21355/tn/njcore_21355-82a1d4df65dac38143eb0bfd0f4ca8bd0cd9fac9-medium.jpg)
09:03
America's national monuments : the legacy of the Great Plains. [Volume 1], Geologic wonders of the northern plains: Devils Tower 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...
![America's national monuments : the geologic West. [Volume 1], Fossil treasures of the Pacific Northwest: Fossil Butte National Monument](https://illumira-media.s3.amazonaws.com/njcore_21374/tn/njcore_21374-09bf226c2caf2e65117a2a9d490628c8201c3d30-medium.jpg)
12:17
America's national monuments : the geologic West. [Volume 1], Fossil treasures of the Pacific Northwest: Fossil Butte National Monument
Fossil Butte National Monument is the world's greatest fossil site with millions of specimens.