Diabase: A dark-colored, fine-grained intrusive igneous rock - Geology.com
Diabase: A hand specimen of diabase approximately ten centimeters across. The bottom salt-and-pepper colored portion is a polished surface displaying the plagioclase (white) and pyroxene (black) minerals that make up this specimen of an intrusive igneous rock. The top part nicely displays a light gray weathering rind that is typical of diabase.
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 ...
16 Photo Gallery of Rocks in Hand Specimen and Thin Section
Diabase is a mafic rock with composition equivalent to gabbro and basalt. But diabase is coarser grained than most basalt and finer grained than most gabbro. The dominant minerals in the diabase shown below, like all diabase, are light-colored plagioclase and …
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Diabase or Dolerite - ALEX STREKEISEN
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 aphanitic chilled margins which may contain tachylite (dark mafic glass).
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Category : Diabase - Wikimedia
2019年1月5日 · English: Diabase or Dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. In North American usage, the term diabase refers to the fresh rock, whilst elsewhere the term dolerite is used for the fresh rock and diabase refers to altered material.
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