These publications are freely distributed by the National Park Service. All require Adobe Acrobat Reader for viewing.
Archeology [130k PDF File]
Geology [161k PDF File]
Did You Know?
Naturally occurring sandstone basins called “potholes” collect rain water and wind-blown sediment, forming tiny ecosystems where a fascinating collection of plants and animals live. Tadpole shrimp, fairy shrimp and many insects can be found in potholes.