Rocks & Minerals

The Geologic Story of Colorado National Monument

Texas Rocks and Minerals: An Amateur's Guide

The Geologic Story of Palo Duro Canyon

The Geology of D.A.R. State Park, Mt. Philo State Forest Park, Sand Bar State Park

The Geology of Button Bay State Park

Preliminary Report on Gowganda Mining Division District of Nipissing Ontario

Fossil Forests of the Yellowstone National Park

The Geologic Setting of the John Day Country: Grant County, Oregon

The Pleistocene of North America and its vertebrated animals

The Flow of Time in the Connecticut Valley: Geological Imprints

Prairie, Peak, and Plateau: A Guide to the Geology of Colorado

Fragments of Earth Lore: Sketches & Addresses Geological and Geographical

Walks and Talks in the Geological Field

Cave Regions of the Ozarks and Black Hills

A Short History of the Academy of Natural Sciences of Philadelphia

The Natural History of Chocolate

Devils Tower National Monument

Underground Treasures: How and Where to Find Them

The Ornithosauria

The Geology of Groton State Forest