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dolerite    
n. 粗粒玄武岩,辉绿岩

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  • Diabase - Wikipedia
    Diabase ( ˈ d aɪ ə ˌ b eɪ s ), also called dolerite ( ˈ d ɒ l ə ˌ r aɪ t ) or microgabbro, [1] 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
  • Diabase or Dolerite : Properties, Composition, Formation - Geology Science
    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
  • Dolerite: Mineral information, data and localities. - mindat. org
    In British and Australian usage: A medium grained mafic intrusive rock whose main components are calcic plagioclase and clinopyroxene and which is characterized by ophitic to subophitic texture; usually found in sills and dykes The preferred term for what is called diabase in the United States
  • What is Dolerite, Properties, and Geological significance
    Dolerite is an intrusive igneous rock that is composed mainly of plagioclase feldspar and pyroxene It is formed when magma is intruded into other rocks, and then cools and solidifies underground Dolerite typically has a fine-grained texture, and is known for its ability to hold a sharp edge
  • Diabase: A dark-colored, fine-grained intrusive igneous rock - Geology. com
    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
    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, laccoliths, or lopoliths
  • Diabase | Igneous, Intrusive, Basaltic | Britannica
    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 Although not popular, it makes an excellent monumental stone and is one of the dark-coloured rocks commercially known as black granite
  • Diabase or Dolerite Properties and Composition | Earth Know
    Dolerite, diabase, or formally microgabbro, is a dark-colored, medium-grained subvolcanic rock equivalent to basalt or gabbro in composition Subvolcanic or hypabyssal rock is a plutonic rock that forms at shallower depths less than 2 km (1 2 mi) from the Earth’s surface
  • Diabase - Igneous Rocks - Sandatlas
    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
  • Dolerite - SpringerLink
    Dolerite is the name given to the medium-grained intrusive basic igneous rock commonly found in dykes and sills; in North America and continental Europe it is often referred to as diabase, but many authors restrict this term to altered dolerite





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