WebA usually dark, coarse-grained igneous rock composed mostly of plagioclase feldspar and clinopyroxene, and sometimes olivine. Gabbro is the coarse-grained equivalent of basalt. WebIt most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro. The difference between basalt and …

Is gabbro ultramafic or mafic? - Studybuff

WebGabbro is a coarse-grained mafic igneous rock, made with mainly mafic minerals like pyroxene and only minor plagioclase. Because mafic lava is more mobile, it is less … WebA layer with 50% plagioclase, 40% pyroxene, 5% olivine and 5% groundmass (in essence a gabbro) would be termed a plagioclase-pyroxene Adcumulate with accessory olivine. A rock consisting of 80% olivine, 5% magnetite and 15% groundmass is an olivine mesocumulate, (in essence a peridotite ). damage by size pathfinder

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WebGabbro is formed when molten rock (magma) is trapped beneath the land surface and cools slowly to form a coarsely crystalline rock (slow cooling gives crystals time to grow). It is … WebGabbros are plutonic rocks formed by cooling and crystallization of molten magma trapped under the Earth’s surface and chemically equivalent to extrusive basalt. The ferromagnesian minerals are pyroxene (diopside or diallage, augite and hypersthene), hornblende, and olivine, occurring either together or singly. Webgabbro, any of several medium- or coarse-grained rocks that consist primarily of plagioclase feldspar and pyroxene. Essentially, gabbro is the intrusive (plutonic) equivalent of basalt, … birdhouse flowers