Diabase - Wikipedia
网页Diabase (/ ˈdaɪ.əˌbeɪs /), also called dolerite (/ ˈdɒl.əˌraɪt /) or microgabbro, [1] is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.
Diabase | Igneous, Intrusive, Basaltic | Britannica
网页diabase, fine- to medium-grained, dark gray to black intrusive igneous rock. It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap.
Diabase or Dolerite : Properties, Composition, Formation
网页2023年8月26日 · 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 means it forms from molten magma that cools and solidifies beneath the Earth’s surface.
Diabase: A dark-colored, fine-grained intrusive igneous rock - Geology.com
网页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 basalt, diabase, and gabbro is in their grain size - which was determined by their cooling rates.
What You Shouldn’t Miss on Diabase or Dolerite Rock
网页2023年9月4日 · 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 in dikes, sills, and sometimes in plugs, sheeted dikes, …
Diabase vs Gabbro: What Are They, And What’s The Difference?
网页Though they are similar, there are some key differences between diabase and gabbro. One of the most notable differences is that gabbro typically contains more olivine or amphibole than diabase. Additionally, gabbro is usually found in mass form, while diabase typically forms dikes or sills.
Diabase - Igneous Rocks - Sandatlas
网页Diabase (dolerite) is a dark-colored igneous rock. It is compositionally equivalent to gabbro and basalt but texturally between them. Diabase is a common rock type. It occurs mostly in shallow intrusions (dikes and sills) of basaltic composition.
Diabase - an overview | ScienceDirect Topics
网页Diabase is a type of rock that is characterized by a massive structure and medium to coarse porphyritic texture, containing plagioclase phenocrysts and augite crystals. It often undergoes moderate hydrothermal alteration. AI generated definition based on: Journal of South American Earth Sciences, 2012. About this page. Chapters and Articles.
Diabases Definition & Meaning - Merriam-Webster
网页noun. di· a· base ˈdī-ə-ˌbās. 1. archaic : diorite. 2. chiefly British : an altered basalt. 3. : a fine-grained rock of the composition of gabbro but with an ophitic texture. diabasic.
Intrusion of horizontal dikes: Tectonic significance of Middle ...
网页1991年7月10日 · Initially horizontal sheet intrusions of Middle Proterozoic diabase are abundant in a region 650 by 300 km across in Arizona and California. The diabase forms discordant sheets in basement granite and gneiss and …