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gabro rock

Gabbro: Igneous Rock

Gabbro is a coarse-grained, dark-colored, intrusive igneous rock. It is usually black or dark green in color and composed mainly of the minerals plagioclase and augite. It is the most abundant rock in the deep oceanic crust. Gabbro has a …

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Gabbro | rock | Britannica

gabbro, 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, but whereas basalt is often remarkably homogeneous in mineralogy and composition, gabbros are exceedingly variable.

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Gabbro Rock | Composition, Uses & Facts

Gabbro is an intrusive igneous rock, composed mostly of pyroxene and plagioclase feldspar. It forms as magma pushes up into overlying rock and cools, giving it larger crystals or grains.

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Gabbro: Identification, Pictures & Info for Rockhounds

Gabbro is an intrusive igneous rock composed primarily of plagioclase feldspar and large amounts of mafic minerals like pyroxene. It has a phaneritic texture, meaning its interlocking crystals can be seen with the naked eye. It is usually dark gray, black, or dark greenish, and is closely related to basalt.

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Gabbro

Gabbro is a coarse-grained igneous rock that is relatively low in silica and rich in iron, magnesium, and calcium. Such rock is described as mafic. Gabbro is composed of pyroxene and calcium-rich plagioclase, with minor amounts of …

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Gabbro

Gabbro is a coarse-grained and usually dark-colored igneous rock. It is an intrusive rock. It means that it formed as magma cooled slowly in the crust. Igneous rocks with similar composition are basalt (extrusive equivalent of gabbro) and diabase (the same rock type could be named dolerite or microgabbro instead).

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Gabbro Rock Type, Composition, Formation, Occurrence

Gabbro is an intrusive igneous rock with a black or dark-green appearance. The term "Gabbro" was first used in the 1760s to name a newly discovered rock found in ophiolites of the Apennine Mountains in Italy. The rock was named after Gabbro, a hamlet near Rosignano Marittimo in Tuscany, Italy.

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