Asked by: Faust Harkin
asked in category: General Last Updated: 26th March, 2020

Is gabbro a Phaneritic?

Gabbro ( /ˈgæbro?/) is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt.

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Furthermore, what is the texture of gabbro?

Gabbro is mafic, intrusive, coarse-grained rock with allotriomorphic texture. Gabbros contain mainly ferromagnesian minerals and plagioclase, the amount of ferromagnesian minerals equaling or exceeding that of the plagioclase.

Also, where is gabbro found? Gabbro is a dense, mafic intrusive rock. It generally occurs as batholiths and laccoliths and is often found along mid-ocean ridges or in ancient mountains composed of compressed and uplifted oceanic crust. Gabbro is the plutonic equivalent of basalt.

Similarly one may ask, does gabbro have crystals?

Gabbros are equivalent in composition to basalts. Basalts are extrusive igneous rocks that cool quickly and have fine-grained crystals. Gabbros are intrusive igneous rocks that cool slowly and have coarse-grained crystals.

What is gabbro rock made of?

Gabbro is an intrusive igneous rock that forms from the result of slow cooling of magma inside of a volcano. It is very similar to the fast cooling, extrusive basalt, as they both are formed from mafic magmas that contain dark colored minerals such as pyroxene, plagioclase, amphibole and olivine.

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