s/n14891678

Information
has gloss	(noun) (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded groundmass
lexicalization	eng: groundmass
subclass of	(noun) rock formed by the solidification of molten magma igneous rock

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has category	(noun) a science that deals with the history of the earth as recorded in rocks geology
part of:substance	(noun) any igneous rock with crystals embedded in a finer groundmass of minerals porphyry, porphyritic rock