Diabase (/ ˈdaɪ.əˌbeɪs /), also called dolerite (/ ˈdɒl.əˌraɪt /) or microgabbro, [1] is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.

Aug 26, 2023 · Diabase, also known as dolerite, is a type of igneous rock that holds significance in the field of geology due to its unique characteristics and formation process. It is an intrusive rock, which …

Dolerite and the synonym diabase are not root names but usually defined as medium grained (1 to 5 mm) mafic intrusive rocks. It can include microgabbro, basalt, andesite, microdiorite and other rock …

In the United States and Canada, the name " diabase " is used for a dark gray to black, fine-grained, intrusive igneous rock that has a composition similar to basalt and gabbro. The difference between …

Sep 4, 2023 · Diabase, dolerite, or microgabbro is a medium-grained, dark-colored, hypabyssal, or subvolcanic rock with a composition similar to plutonic gabbro or volcanic basalt. It commonly occurs …

Dec 28, 2011 · Diabase (dolerite) is a dark-colored hypabyssal igneous rock that is compositionally equivalent to gabbro and basalt, but texturally intermediate between them. It typically forms in …

Diabase or dolerite 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 …

It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap. Although not popular, it makes an excellent monumental stone and is one of the dark-coloured rocks …

Apr 11, 2024 · Dolerite or diabase forms when magma intrudes through deep fractures, zones of weakness, or faults and solidifies at depths less than 2 km from the Earth’s surface.

Jan 6, 2026 · Dolerite is a widespread, dark-colored igneous rock that forms a significant component of the Earth’s crust. It is often encountered in large, sheet-like formations that cut across existing geology.