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mafic rock |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.04 sec. |
mafic rockIn geology, any igneous rock dominated by the silicates pyroxene, amphibole, olivine, and mica. These minerals are high in magnesium and ferrous iron, and their presence gives mafic rock its characteristic dark colour. It is usually contrasted with felsic rock. Common mafic rocks include basalt and gabbro. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| At a modest cost, and over a 5 to 10 year life-span, it would aim at providing the most comprehensive and multidisciplinary knowledge base of the complete record of mafic magmatism in and around Canada, and through stimulating international cooperation, around the world. The coincidence of the trend with mafic volcanics following the topographic height of land suggests a nearby bedrock source. It is located 400 meters north of the Pipestone Fault in mafic volcanic rocks near contact with ultramafic rocks; the majority of the major gold deposits of the Porcupine-Timmins Camp are situated in a similar geologic environment, that is in or near the mafic/ultramafic contact. |
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