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Atlas of Rocks, Minerals, and Textures This web page was constructed to aid undergraduate instruction at the Geology Department of the University of North Carolina.
| BBC Two - The Essential Guide to Rocks Series examining the geology of the United Kingdom.
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British Geological Survey - Rock Classification Comprehensive geological guide covering rock types, identification, and formations.
| Geology - rocks and minerals Academic repository providing physical and petrophysical characterization data for various rock types. University of Auckland"s Geology Department.
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Geology.com - Igneous, Sedimentary, and Metamorphic Rocks Educational guide explaining rock types, properties, and geological cycles.
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Rocas metamórficas Las rocas metamórficas (del griego meta, cambio, y morphe, forma, “cambio de forma”) resultan de la transformación de rocas preexistentes.
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Rock PT - Proficiency Testing in Rock Analysis Geological Society program ensuring analytical quality control in rock and mineral testing.
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USGS - Igneous and Metamorphic Rocks Geological resources detailing petrological classifications, rock formations, and mapping.
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