- sanidine-trachyte
- sanidine-trachyte Sanidintrachyt m
English-German dictionary of Architecture and Construction. 2013.
sanidine-trachyte
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Trachyte — is an igneous, volcanic rock with an aphanitic to porphyritic texture. The mineral assemblage consists of essential alkali feldspar; relatively minor plagioclase and quartz or a feldspathoid such as nepheline may also be present. (See the QAPF… … Wikipedia
Sanidine — is the high temperature form of potassium feldspar (K,Na)(Si,Al)4O8. [Mineral Handbook http://www.minsocam.org/msa/Handbook/Sanidine.PDF ] Sanidine most typically occurs in felsic volcanic rocks such as obsidian, rhyolite and trachyte. Sanidine… … Wikipedia
trachyte — [ trakit ] n. m. • 1801; du gr. trakhus « raboteux » ♦ Minér. Lave de type porphyroïde, rude au toucher. ⇒ obsidienne. Adj. TRACHYTIQUE . ● trachyte nom masculin (grec trakhutês, rudesse, dureté) Roche volcanique intermédiaire, riche en… … Encyclopédie Universelle
sanidine — ● sanidine nom féminin (grec sanidion, planchette) Variété de feldspath potassique que l on trouve dans les roches volcaniques. ⇒SANIDINE, subst. fém. MINÉR. Variété de feldspath orthose que l on trouve dans les roches volcaniques. Le trachyte… … Encyclopédie Universelle
Trachyte — Les trachytes sont des roches volcaniques riches en feldspaths alcalins et à teneur en silice assez élevée : ils appartiennent de ce fait au groupe des roches felsiques. Leur structure est principalement microlithique mais la présence de… … Wikipédia en Français
Sanidine — San i*dine, n. [Gr. ?. ?, a board. So called in allusion to the tabular crystals.] (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; called also {glassy feldspar}. [1913 Webster] … The Collaborative International Dictionary of English
trachyte — trachytic /treuh kit ik/, trachytoid /trak i toyd , tray ki /, adj. /tray kuyt, trak uyt/, n. a fine grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive… … Universalium
glassy feldspar — Sanidine San i*dine, n. [Gr. ?. ?, a board. So called in allusion to the tabular crystals.] (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; called also {glassy feldspar}. [1913 Webster] … The Collaborative International Dictionary of English
feldspar — /feld spahr , fel /, n. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks. Also, felspar.… … Universalium
Tuff — (from the Italian tufo ) is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption. Tuff should not be confused with tufa , another type of rock. Volcanic ashThe products of a volcanic eruption are… … Wikipedia
TRACHYANDÉSITES — Dans la classification de Jung et Brousse les trachyandésites sont des roches volcaniques, intermédiaires entre les basaltes et les roches différenciées du type trachyte et rhyolite ou phonolite. En fait, il existe, parmi les roches volcaniques,… … Encyclopédie Universelle
