overburden rock

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• Overburden pressure — Overburden pressure, also called lithostatic pressure or vertical stress, is the pressure or stress imposed on a layer of soil or rock by the weight of overlying material. The overburden pressure at a depth z is given by where ρ(z) is the density …   Wikipedia

• Overburden — is the material that lies above an area of economic or scientific interest in mining and archaeology; most commonly the rock, soil, and ecosystem that lies above a coal seam or ore body. It is also known as waste or spoil . Overburden is distinct …   Wikipedia

• overburden — [ō΄vər bʉrd′ n; ] for n. [ ō′vər bʉrd΄ n] vt. to burden oppressively; weigh down n. 1. something that overburdens 2. Geol. soil, rock, etc. that is covering or overlying a useful deposit, as of ore …   English World dictionary

• rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …   Universalium

• Rock — /rok/, n. a male given name. * * * I In geology, a naturally occurring and coherent aggregate of minerals. The three major classes of rock igneous, sedimentary, and metamorphic are based on the processes that formed them. These three classes are… …   Universalium

• overburden — v. /oh veuhr berr dn/; n. /oh veuhr berr dn/, v.t. 1. to load with too great a burden; overload: He was overburdened with cares. n. 2. an excessive burden. 3. Also called burden, capping. Mining. waste earth and rock covering a mineral deposit.… …   Universalium

• overburden — 1. noun a) The rock and subsoil that lies above a mineral deposit such as a coal seam b) A sterile stratum that lies above the stratum being investigated 2 …   Wiktionary

• overburden —    1. The loose soil, sand, silt, or clay that overlies bedrock. In some usages it refers to all material overlying the point of interest.    2. The total cover of soil and rock overlying an underground excavation …   Lexicon of Cave and Karst Terminology

• overburden — verb burden excessively. noun 1》 rock or soil overlying a mineral deposit, archaeological site, etc. 2》 an excessive burden. Derivatives overburdensome adjective …   English new terms dictionary

• overburden — v. & n. v.tr. burden (a person, thing, etc.) to excess. n. 1 rock etc. that must be removed prior to mining the mineral deposit beneath it. 2 an excessive burden. Derivatives: overburdensome adj …   Useful english dictionary

• metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …   Universalium