| Geology: - Texas Institute for Geophysics - EPS Berkeley - EPS Harvard - Geo. Sciences Univ. of Michigan - Cornell's Geoscience Inf. Sys. - Brown University Planet. Geology - School of Ocean and Earth Science - IAMG - ODP Geological directories: - Geologynet - Geologyadventures Earthquake: - NCEDC - Berkeley Seismological Lab *** - Global Seismology Laboratory - Seismology Harvard **** - USGS Earthquake ***gov - IRIS - UUSS - QUAKES - ORFEUS - TSRC - Nevada Seismological Laboratory - Oak Ridge National Laboratory - AEIC - CERI - AGU - SCEC - CISN - PALEOMAP - Platetectonics.com - EERI - CREWES - Seismology Research Centre - MITPAN - International Seismological Centre - Platetectonics.com - Seismological Society of America (SSA) - Earthquake.com 321,956 | - Volcanology: - NASA GFSC - USGS Volcano - Volcano Systems Center - Smithsonian GVP - VolcanoWorld - SWVRC - GOSA - SVEurop.org - WOVO - Granular.org - IAVCEI Mineral: - USGS Mineral - The Image - Yuprocks - Tigerminerals - Perlite Mineral Museum : - Smithsonian Gem & Mineral Collect. - -
| Gem Resources and Documentations: U.S. Geological Survey Mineral Gallery Minerals.net The Image IBGM Rockhounds Information Gemlab
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