Granite Basalt Gabbro

Igneous rocks with similar composition are basalt extrusive equivalent of gabbro and diabase the same rock type could be named dolerite or microgabbro instead.

Granite basalt gabbro.

Gabbro definition a dark granular igneous rock composed essentially of labradorite and augite. All rocks of igneous origin consist of magma or molten earth that finds its way up to. Earth contains three kinds of rocks namely igneous rocks sedimentary rocks and metamorphic rocks basalt and granite are two types of igneous rocks. ə b eɪ s or dolerite or microgabbro is a mafic holocrystalline subvolcanic rock equivalent to volcanic basalt or plutonic gabbro diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled margins which may contain tachylite dark mafic glass.

Diabase is the preferred name in north america while dolerite is. It means that it formed as magma cooled slowly in the crust. Basalt is an extrusive fine grained igneous rock formed when the molten materials lava r. Gabbro ˈ ɡ æ b r oʊ 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.

Basalt and gabbro are both mafic igneous rocks having same mineralogy. The key difference between basalt and granite is that basalt is mostly occurring on ocean floors while granite is in the crust of the earth in all continents. Slow cooling coarse grained gabbro is chemically equivalent to rapid cooling fine grained basalt much of the earth s oceanic crust is made of gabbro formed at mid ocean. Diabase ˈ d aɪ.