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A basic, dark-coloured, 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.

Origin: F. Diabase, fr. Gr. A crossing or passing over, fr.; + to go; so called by Brongniart, because it passes over to diorite.

(01 Mar 1998)

di-, di-, di(2-chloroethyl)sulfide, dia- < Prev | Next > diabaterial, diabetes, diabetes and fibre

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