Useful english dictionary. 2012.
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
Porphyritic granite — Granite Gran ite (gr[a^]n [i^]t), n. [It. granito granite, adj., grainy, p. p. of granire to make grainy, fr. L. granum grain; cf. F. granit. See {Grain}.] (Geol.) A crystalline, granular rock, consisting of quartz, feldspar, and mica, and… … The Collaborative International Dictionary of English
porphyritic — pÉ”rfɪ rɪtɪk /pÉ”Ëf adj. of alabaster, pertaining to porphyry (type of rock) … English contemporary dictionary
porphyritic — [ˌpɔ:fɪ rɪtɪk] adjective Geology relating to or denoting a rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass … English new terms dictionary
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
igneous rock — noun rock formed by the solidification of molten magma • Hypernyms: ↑rock, ↑stone • Hyponyms: ↑andesite, ↑aplite, ↑groundmass, ↑adesite, ↑batholith, ↑ba … Useful english dictionary
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
Igneous rock — Geologic provinces of the world (USGS) Shield … 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
extrusive rock — Any igneous rock derived from magma that is poured out or ejected at the Earth s surface. Extrusive rocks are usually distinguished from intrusive rocks on the basis of their texture and mineral composition. Lava flows and pyroclastic debris… … Universalium
