igneous magma

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• Igneous textures — include the rock textures occurring in igneous rocks. Igneous textures are utilized by geologists in determining the mode of origin igneous rocks and are used in rock classification. There are six main types of textures; phaneritic, aphanitic,… …   Wikipedia

• igneous — ► ADJECTIVE Geology ▪ (of rock) having solidified from lava or magma. ORIGIN from Latin ignis fire …   English terms dictionary

• igneous — [ig′nē əs] adj. [L igneus < ignis, a fire < IE base * egnis > Sans agníḥ, fire, Lith ugnìs] 1. of, containing, or having the nature of, fire; fiery 2. produced by the action of fire; specif., formed by volcanic action or intense heat, as …   English World dictionary

• Magma — (griech.), knetbare Masse, Salbe etc., in der Petrographie die glutflüssige Schmelze eines Silikatgesteins, die Gase und Dämpfe in großer Menge absorbiert enthalten kann. Das M. liefert je nach den bei der Erstarrung obwaltenden physikalischen… …   Meyers Großes Konversations-Lexikon

• magma — ► NOUN ▪ hot fluid or semi fluid material within the earth s crust from which lava and other igneous rock is formed by cooling. ORIGIN Greek, from massein knead …   English terms dictionary

• magma — [mag′mə] n. [L, the dregs of an unguent < Gr < massein, to knead < IE base * menk , to knead, crush > MINGLE] 1. a pasty mixture of crude mineral or organic matter 2. liquid or molten rock deep in the earth, which on cooling… …   English World dictionary

• igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

• Igneous rock — Geologic provinces of the world (USGS)   Shield …   Wikipedia

• Igneous differentiation — In geology, igneous differentiation is an umbrella term for the various processes by which magmas undergo bulk chemical change during the partial melting process, cooling, emplacement or eruption. Contents 1 Definitions 1.1 Primary melts 1.2… …   Wikipedia

• Magma — For other uses, see Magma (disambiguation). Lava flow on Hawaii. Lava is the extrusive equivalent of magma. Magma (from Greek μάγμα paste ) is a mixture of molten rock, volatiles and solids[1] …   Wikipedia

• magma — magmatic /mag mat ik/, adj. magmatism, n. /mag meuh/, n., pl. magmas, magmata / meuh teuh/. 1. Geol. molten material beneath or within the earth s crust, from which igneous rock is formed. 2. any crude mixture of finely divided mineral or organic …   Universalium