Geology
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- The Commission on Volcanic Caves
- Originally a working group of the International Union of Speleology. Information on members, symposia on vulcanospeleology, calendar and photographs of lava tubes and other volcanic caves.
- 122
- West Virginia Cave Conservancy
- Dedicated to conservation and preservation of karst resources. Includes information about the state's caves, conservation techniques, educational programs, and links.
- 123
- CfA Space Geodesy Group
- Information about the effects sea level change on coastal geomorphology from the Harvard-Smithsonian Center for Astrophysics.
- 125
- Upham Beach Erosion Control
- Photographs and information on the coastal erosion on this beach in Florida.
- 126
- Glacial Deposition And Depositional Landforms
- Describes, illustrates, and explains glacial and fluvioglacial deposits and landforms, including drumlins, erratics, eskers, kames, kettles, varves, and outwash.
- 127
- USGS Coastal and Marine Geology Program
- Describes ongoing projects and research plans for assessing coastal, estuary, and continental shelf processes, sediment transfer, and related geologic hazards.
- 129
- Astronomy Picture of the Day - Impact: 65 Million Years Ago
- Computer rendering of Chicxulub crater, from gravity and magnetic field data.
- 130
- Astronomy Picture of the Day - Manicouagan Impact Crater on Earth
- Image taken from space shuttle Columbia in 1983.
- 131
- Geology 376 - 2001 Field Trip
- Travelogue of a geology class field trip to the Barringer meteor crater. Images, crater description, topographic map.
- 132
- Impact Structures
- Geology, geophysics, and petrology of impact structures (meteorite impact craters) with special focus on the Azuara and Rubielos de la Cérida impact structures (Spain)
- 134
- Terrestrial Impact Cratering and Its Environmental Effects
- World map of impact sites, details on the Chicxulub site, and details on environmental effects of impacts.
- 136
- The Chiemgau impact
- Geographic, geologic, geophysical, mineralogical-petrographic, geochemical, astronomical and historical characteristics of a Holocene notable asteroid/comet impact and the role of the discovery in the scientific discussion.
- 137
- Traces of Catastrophe
- Online book. Detailed introduction and overview of impact processes, crater formation, and shock metamorphism.
- 138
- Applications of Caesium-137 in Soil Erosion and Sedimentation Studies
- Discusses the use of Caesium-137, an element of radioactive fallout, as a tracer to study the rates and patterns of soil erosion and deposition.