igneous rock

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Related to Magmatic rocks: igneous

igneous rock

The term for a rock formed when molten rock cools and hardens. Extrusive, or volcanic, igneous rock cools on the surface as lava. Intrusive igneous rock forms when molten rock cools underground.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.igneous rock - rock formed by the solidification of molten magma
rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
andesite - a dark grey volcanic rock
aplite - light-colored and fine-grained granitic rock consisting chiefly of quartz and feldspars
groundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded
adesite - dark greyish extrusive rock
batholite, batholith, pluton, plutonic rock - large mass of intrusive igneous rock believed to have solidified deep within the earth
diorite - a granular crystalline intrusive rock
gabbro - one of a family of granular intrusive rocks
pegmatite - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements
peridotite - a dark coarse-grained igneous rock consisting principally of olivine
rhyolite - very acid volcanic rock
volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth
porphyritic rock, porphyry - any igneous rock with crystals embedded in a finer groundmass of minerals
sodalite - a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks
References in periodicals archive ?
As already mentioned, the limited precise chronological and compositional database of the Jurassic magmatic rocks has precluded a precise analysis of this magmatism in southern Colombia.
Along most of the western margin of Patagonia there is an oblique belt of calcalkaline magmatic rocks (Halpern, 1968, 1973), interpreted as a Paleozoic magmatic arc by Ramos (1983).
This will be the first time the magmatic rocks of the lower crust in the Pacific Ocean have been sampled.
So far only the experiments with magmatic rocks have been evaluated.
In the crystalline basement, which is a continuation of the southern Finland Svecofennian orogenic belt, the metamorphic and magmatic rocks of the Lower Proterozoic Jagala complex as well as the intrusive porphyry-like potassium granites of the Neeme massif can be distinguished.
Tectonically associated OIB-type magmatic rocks should not be ascribed to ophiolite sequences because they result from a Lower Cretaceous plume which was active within Neo-Tethys basin.
In the second part of the book an extensive section is dedicated to the metamorphic and magmatic rocks of the Western Alps.
Remanent magnetism of mafic magmatic rocks, if primary, can provide paleo-intensities of the geomagnetic field at the time of crystallization (e.
The anorogenic magmatic rocks within the Estonian basement have been relatively well studied.
Various bodies of K-rich to ultra-potassic magmatic rocks in the Moldanubian Zone of the Bohemian Massif (Holub 1997, Gerdes et al.
Nevertheless, exploration of massifs of magmatic rocks shows amazing constancy of their composition in vast areas.