Definition of diabase

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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..

Lern More About Diabase

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..
Ophite :: Ophite (n.) A greenish spotted porphyry, being a diabase whose pyroxene has been altered to uralite; -- first found in the Pyreness. So called from the colored spots which give it a mottled appearance..
Lath-shaped :: Lath-shaped (a.) Having a slender elongated form, like a lath; -- said of the feldspar of certain igneous rocks, as diabase, as seen in microscopic sections..
Greenstone :: Greenstone (n.) A name formerly applied rather loosely to certain dark-colored igneous rocks, including diorite, diabase, etc..
Viridite :: Viridite (n.) A greenish chloritic mineral common in certain igneous rocks, as diabase, as a result of alternation..
Variolite :: Variolite (n.) A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance..
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