igneous rock


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Related to igneous rock: Intrusive igneous rock

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 classic literature ?
Upon the shore he found an out-cropping of brittle, igneous rock. By dint of much labour he managed to chip off a narrow sliver some twelve inches long by a quarter of an inch thick.
Summary: TEHRAN (FNA)- While volcanic, igneous rock predominates on Mars, virtually the entire Earth fossil record comes from sedimentary rocks.
The hard, igneous rock granite is one of the top choices when it comes to incorporating stone into your home.
The columns are made of an igneous rock called basalt.
According to a geologist who examined a photograph of the Luzon Datum, it is diorite, an igneous rock characterized by its 'salt and pepper' look and which usually hosts copper mineralization.
For example, Mauna Loa contains higher proportions of an igneous rock called pyroxenite, which comes from subducted ocean crust that typically melts at deeper levels than the model suggests.
The upper Midwest sits over an abundance of sedimentary and igneous rock. Sedimentary rock is relatively conductive compared to most rock types, while igneous is dense and insulating, and this contrast generates a strong local current when geoelectric storms occur.
To the west and eastern border lies igneous rock that forms the main range granite and boundary range granite, respectively [16].
The potash feldspar is essential minerals of granite an igneous rock.
These are fictitious players with names such as Igneous Rock ("looks tough but has holes in his game").
(2) GEOLOGY Morales worked primarily with granite, which is an igneous rock. Obtain samples of sedimentary, igneous and metamorphic rocks.
Although the stratified and igneous rock record of this activity is largely lacking in Maine, the adjacent regions of Atlantic Canada (Maritimes Basin) and coastal southern New England (Narragansett Basin) contain thick successions of largely non-marine Carboniferous strata that were deposited in large transtensional pull-apart basins.