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high magnesium fine grained igneous rock

http://resource.geosciml.org/classifier/cgi/lithology/high_magnesium_fine_grained_igneous_rocks

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.

example

boninite
picrite

narrower

http://resource.geosciml.org/classifier/cgi/lithology/boninite original
	broader	high_magnesium_fine_grained_igneous_rocks original

http://resource.geosciml.org/classifier/cgi/lithology/komatiitic_rock original
	broader	high_magnesium_fine_grained_igneous_rocks original

source

LeMaitre et al. 2002

type

Resource original
Concept original

broader

http://resource.geosciml.org/classifier/cgi/lithology/fine_grained_igneous_rock original
	narrower	high_magnesium_fine_grained_igneous_rocks original

in scheme

simplelithology original

is primary topic of

high_magnesium_fine_grained_igneous_rocks&_properties=definition