This site has photomicrographs of many igneous and metamorphic rock textures. From the University of North Carolina. (
http://www.geolab.unc.edu/Petunia/IgMetAtlas/mainmenu.html
)
A collection of photographs of common igneous rocks with useful information as a review for igneous rock identification. (
http://seis.natsci.csulb.edu/basicgeo/IGNEOUS_TOUR.html
)
Web site from colleague John Butler, formerly of the University of Houston, who was a visonary of geological education on the Internet and who (sadly) is no longer with us. (
http://www.uh.edu/~jbutler/physical/chapter345.html
)
A nice web site describing igneous processes and igneous rocks from St. Mary's University in Canada. (
http://www.stmarys.ca/academic/science/geology/earth/pubigneous/overview.html
)
Learn about the geological origins and mineral resources of mafic and ultramafic rocks in Canada from the Geological Survey of Canada. (
http://wwwims1.gsc.nrcan.gc.ca/projects/mmdc/mafic_ultra_home_e.html
)
Learn about the origins of felsic igenous rocks from Dr. Stephen A. Nelson at Tulane University, New Orleans, Louisiana, USA. (
http://www.tulane.edu/~sanelson/geol212/cont_lithosphere.htm
)
A description of magma formation and crystallization from Dr. Cassi Paslick of Rock Valley College, Illinois, USA. (
http://ednet.rvc.cc.il.us/~cpaslick/101-7IgPt2.htm
)
If you feel that igneous processes and rocks are "greek" - guess what? (
http://www.geology.upatras.gr/children/How%20Igneous%20Rocks%20Are%20Formed.htm
)
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