Rocks & Minerals

Eurypterids of the Devonian Holland Quarry Shale of Ohio

Pearls and Pebbles; or, Notes of an Old Naturalist

The Outlaw

Inside Illinois: Mineral Resources

A Monograph of the Trilobites of North America: with Coloured Models of the Species

The Geology of Mt. Mansfield State Forest

The Geology of Groton State Forest

Geology and Inhabitants of the Ancient World

Thoughts on a Pebble, or, A First Lesson in Geology

The Forms of Water in Clouds and Rivers, Ice and Glaciers

Essay on the Theory of the Earth

Industrial Minerals and Metals of Illinois

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

The Ultimate Rockhounding Handbook

The Common Rocks and Minerals of Missouri

The Nakimu Caves, Glacier Dominion Park

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