Geology In Michigan http://www.michigan.gov/deq/0,4561,7-135-3311_3582---,00.html
US Geological Survey http://www.usgs.gov/
USGS Minerals Program http://minerals.er.usgs.gov/
National Park Service Geology http://www2.nature.nps.gov/geology/publications/index.cfm
Geology of National Parks (3D glasses needed to see images clearly) http://3dparks.wr.usgs.gov/index.html
Geologic Time http://pubs.usgs.gov/gip/geotime/
Mineral Information Institute http://www.mii.org/
Mineralogy Databases http://webmineral.com/ and http://www.mindat.org/
Rocks and Minerals http://www.rocksandminerals4u.com/index.html
http://www.sailorenergy.net/Minerals/MineralMain.html Jeff Anderson's Web Page
http://mi.aipg.org/links.htm
www.geology.com
http://www.amfed.org/mwf/
http://www.amfed.org/
US Geological Survey http://www.usgs.gov/
USGS Minerals Program http://minerals.er.usgs.gov/
National Park Service Geology http://www2.nature.nps.gov/geology/publications/index.cfm
Geology of National Parks (3D glasses needed to see images clearly) http://3dparks.wr.usgs.gov/index.html
Geologic Time http://pubs.usgs.gov/gip/geotime/
Mineral Information Institute http://www.mii.org/
Mineralogy Databases http://webmineral.com/ and http://www.mindat.org/
Rocks and Minerals http://www.rocksandminerals4u.com/index.html
http://www.sailorenergy.net/Minerals/MineralMain.html Jeff Anderson's Web Page
http://mi.aipg.org/links.htm
www.geology.com
http://www.amfed.org/mwf/
http://www.amfed.org/