A coarse-grained, mafic, intrusive igneous rock formed by magma cooling slowly into a wholly crystalline mass deep beneath the surface. It has the same chemical composition and mineralogy as rapidly cooled, fine-grained basalt, and much of Earth's oceanic crust is made of it, formed at mid-ocean ridges; the dimension stone trade often sells it as black granite. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Formation ClassIgneous, intrusive (slow cooling of magma into a holocrystalline mass deep beneath the surface) 1 Classification
Classification UseBuilding and Construction 1 Connections
Associated With
Gabbro has the same chemical composition and mineralogy as rapidly cooled, fine-grained basalt.
Source Gabbro (Wikipedia)
Chemically equivalent to coarse-grained plutonic gabbro; diabase is the subvolcanic (intermediate-depth) equivalent.
Source Diabase (Wikipedia)
Classified As
In Discipline
Source Gabbro (Wikipedia)
Sources
1. Gabbro (Wikipedia)
Wikimedia FoundationLead section
Slow-cooling, coarse-grained gabbro has the same chemical composition and mineralogy as rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges.
Lead section
Gabbro ( GAB-roh) is a phaneritic (coarse-grained), mafic (magnesium- and iron-rich), intrusive igneous rock formed from the slow cooling magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro has the same chemical composition and mineralogy as rapid-cooling, fine-grained basalt.
Article text
It is often called "black granite" commercially, just as other intrusive rocks are called "granite" in the dimension stone industry.
View the Source Wikidata: Gabbro
Wikidata Q46947
Diabase (Wikipedia)
Wikimedia FoundationAssociated With: Diabase, Lead sectionQuote, Associated With: Diabase, Lead section
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock chemically equivalent to volcanic basalt or plutonic gabbro.
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