National Audubon Society: Field Guide to Rocks & Minerals Bears Ears and drills

and drills

Pages: 141 p

ABSTRACT The drilling of seven core holes by the Utah Geological and Mineral Survey was done under contract with the United States Geological Survey

moderately productive

This first all-photographic field guide features 794 full-color images of all the important rocks

National Audubon Society: Field Guide to Rocks & Minerals Bears Ears and drillsBy: National Audubon Society This first all photographic field guide features 794 full color images of all the important rocks, gems, and minerals of North America, showing their many variations of color and crystal form. The text provides descriptions of 200 minerals (including 20 classified as gemstones) and 40 rocks, as well as descriptions of the natural environments where they occur. Photographically organized by color for quick and easy