feldspars
111basalt — basaltic, basaltine /beuh sawl tin, tuyn/, adj. /beuh sawlt , bas awlt, bay sawlt/, n. the dark, dense igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure.… …
112beach — beachless, adj. /beech/, n. 1. an expanse of sand or pebbles along a shore. 2. the part of the shore of an ocean, sea, large river, lake, etc., washed by the tide or waves. 3. the area adjacent to a seashore: We re vacationing at the beach. v.t.… …
113Beach — /beech/, n. 1. Moses Yale, 1800 68, U.S. newspaper publisher. 2. Rex Ellingwood /el ing wood /, 1877 1949, U.S. novelist and short story writer. * * * I Sediments that accumulate along sea or lake shores. One type of beach occurs as a sediment… …
114calcium — /kal see euhm/, n. Chem., Biol. a silver white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element… …
115dolomite — dolomitic /dol euh mit ik/, adj. /doh leuh muyt , dol euh /, n. 1. a very common mineral, calcium magnesium carbonate, CaMg(CO3)2, occurring in crystals and in masses. 2. a rock consisting essentially or largely of this mineral. [1785 95; < F,… …
116felsic — /fel sik/, adj. Geol. (of rocks) consisting chiefly of feldspars, feldspathoids, quartz, and other light colored minerals. Cf. mafic. [1910 15; FEL(DSPAR) + S(ILICA) + IC] * * * …
117geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
118gibbsite — /gib zuyt/, n. a mineral, hydrated aluminum oxide, Al2O33H2O, occurring in whitish or grayish crystals and masses: an important constituent of bauxite ore. Also called hydrargillite. [1815 25; named after George Gibbs (d. 1833), American… …
119granite — granitic /greuh nit ik/, adj. granitelike, adj. /gran it/, n. 1. a coarse grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz, usually with lesser amounts of one or more other minerals, as mica, hornblende, or… …
120graywacke — /gray wak , wak euh/, n. Geol. a dark gray coarse grained wacke. Also, greywacke. [1805 15; partly trans., partly adapted from G Grauwache; see WACKE] * * * or dirty sandstone Sedimentary rock composed of sand sized grains in a fine grained clay… …
