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Permian Basin
(Encyclopedia) Permian Basin or West Texas Basin, extensive sedimentary basin, West Texas and SE New Mexico. Covering an area of more than 75,000 sq mi (194,000 sq km), its main components are the…Werner, Abraham Gottlob
(Encyclopedia) Werner, Abraham GottlobWerner, Abraham Gottlobäˈbrähäm gôtˈlōp vĕrˈnər [key], 1750–1817, German geologist. In 1775 he became inspector and teacher in the mining academy at Freiberg,…sediment
(Encyclopedia) sediment, mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock). Sediments…stratigraphy
(Encyclopedia) stratigraphy, branch of geology specifically concerned with the arrangement of layered rocks (see stratification). Stratigraphy is based on the law of superposition, which states that…granite
(Encyclopedia) granite, coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor…gravel
(Encyclopedia) gravel, particles of rock, i.e., stones and pebbles, usually round in form and intermediate in size between sand grains and boulders. Gravel is composed of various kinds of rock, the…topaz
(Encyclopedia) topaztopaztōˈpăz [key], aluminum silicate mineral with either hydroxyl radicals or fluorine, Al2SiO4(F,OH)2, used as a gem. It is commonly colorless or some shade of pale yellow to…mineral
(Encyclopedia) mineral, inorganic substance occurring in nature, having a characteristic and homogeneous chemical composition, definite physical properties, and, usually, a definite crystalline form…Lizard, The
(Encyclopedia) Lizard, The, peninsula, Cornwall, SW England. Its southern extremity (the southernmost point of Great Britain) is called Lizard Point or Lizard Head. The coast has colored serpentine…Lyme Regis
(Encyclopedia) Lyme RegisLyme Regislīm rēˈjĭs [key], town (1991 pop. 3,447), Dorset, SW England. The town is a tourist resort. Paleontological discoveries have been made in the blue Lias rocks…Trending
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