Geology

Volcanoes

The Romance of Modern Geology

My experiments with volcanoes

The Earth's Beginning

Mystic Peak Legends

Life in China

Earth's Changing Climate

Tiny Planet Patterns

Fierce Volcano Runs

Lesser Known Paths

Desert Encounters

Undersea Crystal Tunnels

Guide to the Geologic Map of Illinois

Raging Storm Hunts

Tidal Arch Realms

Ocean Depth Realms

Urban Heat Islands

Soil Erosion Crisis

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

Deep Cave Missions