Minerals

• The Mineralogical Society of America
• The Mineral Gallery

Geologic Time

• Geologic Time Scale
• USGS: Fossils, Rocks, and Time
• UC Berkeley Museum of Paleontology, Geologic Time Page
   

Geologic hazards: landslides

• http://landslides.usgs.gov/index.html

Mass Wasting

• USGS National Landslide Information Center
• Mass Earth Movements

Volcanoes

• MTU Volcanoes Page
• The Electronic Volcano
• Volcano World
• Volcano Teaching

Earthquakes

• USGS Earthquake Information
• Univ. Nevada Reno- About Earthquakes Page

Plate Tectonics

• USGS: This Dynamic Earth
• Live Science: Plate Tectonics