• United States Geological Survey
• Maryland Geological Survey
• British Geological Survey
• The BBC's Essential Guide to Rocks
• Geologylink
• USGS's General Interest Publications

Geological Organizations

• Geological Society of America
• American Association of Petroleum Geologists
• American Geophysical Union
• The Geological Society (London, UK)

Internships & Jobs Opportunities

• EcoJobs.com
• USGS Earth Sciences Internship Program
• Geosci Job & Internship Archives
• www.eco.org
• Student Conservation Assocation

Maps, Areal Photographs, & GIS Data

• MicroSoft Terraserver (satellite photos of anywhere in world!)
• The National Ocean Service's Mapfinder
• ORES's Index of Geography and GIS Resources
• USGS Declassified Inteliigence Satellite Photographs
• Global Land Information System
• Earthshots: Satellite Images of Environmental Change
• Earth Observations Photography Database

Geoscience Libraries

• Stanford University Earth Sciences Library
• UC Berkeley Earth Sciences and Map Library
• University of Texas at Austin Geology Library

Environmental Geology & Energy

• Ecology Communications
• Enviro-link
• Global Energy Marketplace
• US Department of Energy
• The EPA
• NOAA's Paleoclimatology Program
• National Marine and Coastal Geology Program

• The National Earthquake Info. Center
• The Near-Real-Time Earthquake Bulletin
• Seismo-surfing on the `Net
• USGS Earthquake Information
• "Virtual Earthquake"
• Relative Plate Motion Calculator

Volcanology

• Volcano World
• The Cascades Volcano Observatory
• Volcano Watch
• Volcanoes.com
• The Volcano Home-page (movies, pictures, sound-clips...)
• The Smithsonian's Global Volcanism Program

Planetary Geology

• Nasa's Mars Pathfinder Site

Minerology and Petrology

• Igneous and Metamorphic Thin Section Atlas
• Athena Minerology
• Links for Minerologists
• Amythest Gallery's Mineral Gallery
• The Museum of Minerology in Paris
• USGS Minerals Info.

Hydrogeology

• Hydrology Web
• International Association of Hydrologists
• USGS's Water Resources Info.
• USGS Current Streamflow Conditions
• USGS National Water Conditions
• National Water Quality Assessment Program
• USGS Water Use Data

Sedimentology

• Society for Sedimentary Geology

Historical Geology & Paleontology

• Global Earth History (neat maps!)