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Diorite :: Diorite (n.) An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone..

Greenstone :: Greenstone (n.) A name formerly applied rather loosely to certain dark-colored igneous rocks, including diorite, diabase, etc..

Diabase :: Diabase (n.) A basic, dark-colored, holocrystalline, igneous rock, consisting essentially of a triclinic feldspar and pyroxene with magnetic iron; -- often limited to rocks pretertiary in age. It includes part of what was early called greenstone..

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