National Audubon Society: Field Guide to Fossils Hiking Books and Yellowstone south to the

and Yellowstone south to the Grand Canyon and northern New Mexico

This first all-photographic field guide to fossils features 474 full-color identification pictures of fossilized sponges

while the canyons descend below the page surface

showing flowers close-up and in their natural surroundings

National Audubon Society: Field Guide to Fossils Hiking Books and Yellowstone south to theBy: National Audubon Society A detailed field guide to make fossil identification easy! This first all photographic field guide to fossils features 474 full color identification pictures of fossilized sponges, corals, trilobites, shells, teeth, and bones. Also included are 33 photographs of fossil bearing rocks and outcrop formations, plus 15 maps. It also overviews the geologic ages and history of life on earth from the Precambrian Eon to the