Rainbow Basin National Natural Landmark
Rainbow Basin National Natural Landmark is just a few miles north of Barstow. The multi-hued sedimentary layers were laid down between 10 and 30 million years ago. Wind and water have eroded the basin, creating narrow canyons where every turn leads to a colorful display and geologic marvels.
http://www.ca.blm.gov/barstow/basin.html
Trails and Treasures Home Page Journey to the American Southwest 2003