Quartz-rock
91Quartz Mountains — The Quartz Mountains are an extension of the Wichita Mountains in the far southwestern part of the state of Oklahoma. The section extends west and northwest of the main Wichita range separated by a plain dotted with smaller foothills. The tallest …
92rock — 1. n. 1 a the hard material of the earth s crust, exposed on the surface or underlying the soil. b a similar material on other planets. 2 Geol. any natural material, hard or soft (e.g. clay), consisting of one or more minerals. 3 a a mass of rock …
93Rock — 1. n. 1 a the hard material of the earth s crust, exposed on the surface or underlying the soil. b a similar material on other planets. 2 Geol. any natural material, hard or soft (e.g. clay), consisting of one or more minerals. 3 a a mass of rock …
94rock — I (New American Roget s College Thesaurus) v. i. swing, sway, oscillate, teeter. See oscillation. n. crag, boulder, cliff, stone; refuge, haven, support, defense; slang, diamond, jewel, gem. See land, stability. II (Roget s IV) n. 1. [A… …
95quartz-dolerite — A variety of dolerite which contains interstitial quartz usually intergrown graphically with feldspar, forming patches of micropegmatite. A dyke rock of worldwide distribution, well represented by the Whin Sill rock in N. England …
96quartz monzonite — ▪ mineral also called adamellite intrusive igneous rock (solidified from a liquid state) that contains plagioclase feldspar, orthoclase feldspar, and quartz. It is abundant in the large batholiths (great masses of igneous rocks mostly… …
97rock crystal — noun clear, colourless form of the silica based mineral quartz, often called pure quartz or clear quartz …
98quartz — Crystalline silica, SiO2, occurring either in prisms capped by rhombohedra (low temperature quartz, stable up to 573°C) or in hexagonal bipyramidal crystals (high temperature quartz, stable above 573°C). Widely distributed in rocks of all kinds;… …
99rock crystal — noun a clear quartz used in making electronic and optical equipment • Syn: ↑transparent quartz • Hypernyms: ↑quartz • Hyponyms: ↑rhinestone …
100quartz — A crystalline form of silicon dioxide used in chemical apparatus and in optical and electric instruments. * * * quartz kwȯ(ə)rts n a mineral SiO2 consisting of a silica that occurs in colorless and transparent or colored hexagonal crystals and… …
