aphanitic texture

афанитовая структура
скрытозернистое строение

English-Russian dictionary of geology. 2011.

Смотреть что такое "aphanitic texture" в других словарях:

  • Vesicular texture — is a volcanic rock texture characterised by, or containing, many vesicles. The texture is often found in extrusive aphanitic, or glassy, igneous rock. The vesicles are small cavities formed by the expansion of bubbles of gas or steam during the… …   Wikipedia

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

  • aphanite — aphanitic /af euh nit ik/, adj. /af euh nuyt /, n. Petrog. a fine grained igneous rock having such compact texture that the constituent minerals cannot be detected with the naked eye. [1860 65; < Gk aphan(és) unseen, hidden, invisible (a A 6 +… …   Universalium

  • Dacite — Aphanitic QAPF diagram denoting daci …   Wikipedia

  • Igneous rock — Geologic provinces of the world (USGS)   Shield …   Wikipedia

  • Igneous textures — include the rock textures occurring in igneous rocks. Igneous textures are utilized by geologists in determining the mode of origin igneous rocks and are used in rock classification. There are six main types of textures; phaneritic, aphanitic,… …   Wikipedia

  • List of rock textures — This page is intended to be a list of rock textural and morphological terms. A * Adcumulate * Agglomeritic * Adamantine a type of lustre * Amygdaloidal * Anhedral * Antitaxial veins * Aphanitic * Aplitic; aplite * Augen textured gneiss *… …   Wikipedia

  • Diabase — /ˈd …   Wikipedia

  • Rock microstructure — includes the texture of a rock and the small scale rock structures. The words texture and microstructure are interchangeable, with the latter preferred in modern geological literature. However, texture is still acceptable because it is a useful… …   Wikipedia

  • Felsic — is a term used in geology to refer to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. The term combines the words feldspar and silica. Felsic minerals are… …   Wikipedia

  • Volcanic rock — is an igneous rock of volcanic origin. Texture Volcanic rocks are usually fine grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are… …   Wikipedia

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