Rocks & Minerals

The Common Rocks and Minerals of Missouri

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

Gems in the Smithsonian Institution

The Geology of Button Bay State Park

The Geologic Story of Colorado National Monument

Fossil Forests of the Yellowstone National Park

Ancient Landscapes of the Grand Canyon Region

Texas Gemstones

The Book of the Pearl

The Geology of Mt. Mansfield State Forest

Earth Features and Their Meaning An Introduction to Geology for the Student and the General Reader

The Geology of Groton State Forest

Fragments of Earth Lore: Sketches & Addresses Geological and Geographical

Underground Treasures: How and Where to Find Them

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Beach Rambles in Search of Seaside Pebbles and Crystals

Mount Rainier, a Record of Exploration

Canyons of the Colorado

Across Mongolian Plains