Diabase: A dark-colored, fine-grained intrusive igneous rock - Geology.com
Diabase is an intrusive igneous rock of basaltic composition. It has been used as a construction stone for thousands of years. Its most famous use is in the standing stones of Stonehenge.
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
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 …
What You Shouldn’t Miss on Diabase or Dolerite Rock
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, laccoliths, or lopoliths.
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.
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
2024年4月11日 · On the QAPF classification, diabase is defined as a medium-grained igneous rock with no more than 10% and 20% feldspathoids and quartz of the QAPF by volume, respectively, with plagioclase no less than 90% of total feldspar.
Diabase - an overview | ScienceDirect Topics
Basalt and its intrusive equivalents (dolerite and gabbro) are by far the most abundant igneous rocks on the surface of the Earth and other rocky planets and satellites in the solar system. By definition, basalt is a fine-grained basic igneous rock composed of calcic plagioclase and augite, with or without olivine.
Igneous Rocks - Diabase
Igneous Rocks - Diabase (Dolerite) Colour: When fresh it is black, dark-grey or green; may be mottled black and white. Grain size: Medium. Texture: Occasionally ophitic texture can be distinguished in hand specimen. May be porphyritic. Structure: Vesicles and amygdales occur.
Outdoor Geology Lab Tour: Diabase - Wake Tech
Diabase is a fine-grained igneous rock that would have formed when molten rock material cooled rapidly on or near the surface of the Earth. How would a geologist figure out how it formed using rock characteristics?