igneous rock


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Related to igneous rock: Intrusive igneous rock

igneous rock:

see rockrock,
aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their origin, into three major classes—igneous, sedimentary, and metamorphic.
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igneous rock

A class of rock formed by change of the molten material to the solid state; generally termed granite if coarse-grained.
References in periodicals archive ?
365-355 Ma bimodal intrusive and extrusive alkalic igneous rocks in the Cobequid Highlands of central Nova Scotia (Dunning et al.
Within the Precordillera, the existence of igneous rocks of early Carboniferous age is restricted to dykes recognised in the Devonian Codo Formation, to the north of study area (Sessarego et al, 1990).
For example, evidence of extensive magma mixing can generally be detected from variations in chemical composition of an igneous rock body as well as from field evidence.
Above Earth's surface, magma hardens into igneous rocks (lava, basalt, granite).
Interpretation of spectrally enhanced Landsat TM imagery representing the arid, mountain desert terrain of the Kunlun Mountains revealed areas of dark rocks (probably basic igneous rocks or their metamorphic derivatives).
The animal was trapped in a small (7 m tall) tree that was growing over an igneous rock outcrop.
Chromite occurs as magmatic segregations in ultrabasic igneous rocks.
Geology: Magmatic or igneous rocks are the primary source of phosphorus on Earth.
The researchers now have a new theory for how the granite - an igneous rock common on Earth-could have formed there.
TEHRAN (FNA)- Researchers now have stronger evidence of granite on Mars and a new theory for how the granite -- an igneous rock common on Earth -- could have formed there, according to a new study.
As well as looking at the sill and all the secrets its igneous rock has frozen within it, there will be an opportunity to explore the strangely folded Graymare Rock and the rare flora of the whin grassland.