Geology
Rocks and Minerals
- Mineral Resources: Mineralogy, databases...
- Marine Geology: The geology of the ocean floors
The Earth
- Maps and Mapping: Map reading, geological maps, map construction...
- California Geology: Resources for California teachers
- : National repository for geophysical data.
- : Human influence on the Earth
Imagery of the Earth
- : Global change, astrogeology, Terralook, etc.
- : Photos of Earth from space
- : LandSat photos of Earth
- : Geological Digital Image Library
- : Select satellite view
Earthquakes & Tectonics
- : Good Introductory information on seismology
- Plot earthquakes - Flash file for dynamic plotting
- : National Earthquake Information Service
- : Seismological reports and teaching ideas
- : United States Geological Survey
- : Print a seismogram for a particular day and time.
- : USGS online book on tectonics
Volcanoes
- : Useful information and links about volcanology
- : Volcanoes in the cascades plus links elsewhere
Hydrology
- : USGS water resource information
- : Information from USGS
- : Environmental Protection Agency; information on water quality
- : EPA maps on watersheds throughout the US
- : Time Hydrologic data from USGS
Professional Organizations
- Education Organizations: Special insteres groups for the teaching geology
- : Professional organization of geologists