دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the emission of magma (as lava) at the earths surface. 2. the body of igneous rock produced by the process of extrusion.

adj: volcanic;derived from magnetic materials poured out on the earths surface, as distinct from intrusive rocks formed from magma that has cooled and solidified beneath the surface.

a description of rock resulting from a magma breach to surface and exposed to atmospheric conditions during cooling.

an area in the upper mantle from which magma rises. A hot spot can endure for 10 million years or more.

abbr: igneous;used in drilling reports. igneous rock n: a rock mass formed by the solidification of magma within the earths crust or on its surface. It is classified by chemical composition and grain size. Granite is an igneous rock.

n: an igneous rock that, while molten, penetrated into or between other rocks and solidified.

n: a kinds of eruptive rock that formed by condensation of other rock beause of magma inbreak.

n: magma that reaches the surface of the earth.

magma that comes to the earth’s surface.

n: the hot fluid matter within the earths crust that is capable of intrusion or extrusion and that produces igneous rock when cooled.

molten rock (lava) that crystallizes into an igneous rock.

n: the possible sequences of events, all interrelated, by which rocks may be formed, changed, destroyed. or transformed into other types of rock. The events include formation from magma, erosion, sedimentation, and metamorphism.

n: a deep trench formed in the ocean floor along the line of convergence of oceanic crust with other oceanic or continental crust when one plate (always oceanic) dives beneath the other. The plate that descends into the hot mantle is partially melted. Magma rises through fissures in the heavier, unmelted crust above, creating a line of plutons and volcanoes that eventually form an island arc parallel to the trench.