conductivity of rocks

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• Typical values of thermal conductivity — ▪ Table Typical values of thermal conductivity (in 0.001 calories per centimetre per second per degree Celsius) material at 20 °C at 200 °C typical rocks   4–10 granite   7.8 6.6 gneiss (perpendicular to banding)   5.9 5.5 (100 °C) (parallel to… …   Universalium

• hydraulic conductivity — noun A material property (e.g., for rocks or soil) that describes the rate which water can flow through pore spaces or fractures. SI units: m/s. Symbol: K …   Wiktionary

• earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …   Universalium

• Frederick Vine — Frederick John Vine (born June 17, 1939) is a marine geologist and geophysicist and was a key contributor to the theory of plate tectonics. Early lifeVine was born in London, W4 and educated at Latymer Upper School and St John s College,… …   Wikipedia

• 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

• geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …   Universalium

• Porosity — or void fraction is a measure of the void (i.e., empty ) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… …   Wikipedia

• Diamond — This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation) …   Wikipedia

• hydrosphere — /huy dreuh sfear /, n. the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere. [1885 90; HYDRO 1 + SPHERE] * * * Discontinuous layer of water at or near the Earth s surface. It… …   Universalium

• Archie's law — In petrophysics, Archie s law relates the in situ electrical conductivity of sedimentary rock to its porosity and brine saturation: :C t = C w phi^m S w^n Here, phi denotes the porosity, C t the electrical conductivity of the fluid saturated rock …   Wikipedia