http://resource.geosciml.org/classifier/cgi/lithology/high_magnesium_fine_grained_igneous_rocks
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definition | fine-grained igneous rock that contains unusually high concentration of MgO. For rocks that contain greater than 52 percent silica, MgO must be greater than 8 percent. For rocks containing less than 52 percent silica, MgO must be greater than 12 percent. | ![]() |
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source | LeMaitre et al. 2002 | ![]() |
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in scheme | simplelithology | |||||||||
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is primary topic of | high magnesium fine grained igneous rocks& properties=definition |