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Aphanite - Wikipedia, the free encyclopedia
Aphanite (from the Greek αφανης, invisible) is a name given to certain typically dark-coloured igneous rocks which are so fine-grained that their component mineral crystals are not detected by the un...
en.wikipedia.org/wiki/Aphanite |
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Aphanitic rock is igneous rock in which the grain or crystalline structure is too ... Basalt from surface lava flow often exhibits an aphanitic texture. ...
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Definition of aphanitic in the Online Dictionary. Meaning of aphanitic. Pronunciation of aphanitic. Translations of aphanitic. aphanitic synonyms, aphanitic antonyms. Information about aphanitic in the free online English dictionary and encyclopedia. ... aphanitic; Aphanitic rock; Aphanitic rock; aphanitism; Aphanius;
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Britannica online encyclopedia article on aphanitic texture (geology), ...categories are derived from the Udden-Wentworth scale developed for sediment. For igneous and metamorphic rocks, the terms are generally used as modifiers—e.g., medium-grained granite. ... Aphanitic is a descriptive term for small crystals,
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Aphanitic rocks have mostly invisible mineral grains. ... Aphanitic ("AY-fa-NIT-ic") rocks have mineral grains that are mostly too small to be seen with the naked eye or a hand lens, like this rhyolite...
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aphanitic ( ′afə′nidik ) ( petrology ) Referring to the texture of an igneous rock in which the crystalline components are not distinguishable by the ... Sci-Tech Dictionary: aphanitic...
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Aphanitic texture consists of small crystals that cannot be seen by the eye with or hand lens. The entire rock is made up of small crystals, which are generally less than 1/2 mm in size. This texture results from rapid cooling in volcanic or hypabyssal (shallow subsurface) environments.
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In aphanitic texture, individual crystals are so small that they cannot be seen without a microscope. Rocks with this texture appear to be massive and textureless. However, when a thin section of an aphanitic rock is viewed under a microscope, its crystalline structure is readily apparent.
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Definition of aphanitic from Webster's New World College Dictionary. Meaning of aphanitic. Pronunciation of aphanitic. Definition of the word aphanitic. Origin of the word aphanitic. ... Dictionary Home » Webster's New World College Dictionary » aphanitic...
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