- GSA - Geological Society of America
- AGU - American Geophysical Union
- AAPG - American Association of Petroleum Geologists
- EGU - European Geosciences Union
- CGU - Canadian Geophysical Union
- GSA-Structure/Tectonics
- Illinois State Geological Survey
- US Geological Survey
- Illinois State Water Survey
- Links to most Earth Sciences Departments
- NASA Home Page
- NOAA National Geophysical Data Center
- National Science Foundation
- Structural Geology and Tectonics Resources (maintained by Kevin Smart, Univ. Okla.)