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.

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Noun

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

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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.

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Summary: TEHRAN (FNA)- While volcanic, igneous rock predominates on Mars, virtually the entire Earth fossil record comes from sedimentary rocks.

Martian Life Clues: Looking at Wrong Rocks?

The hard, igneous rock granite is one of the top choices when it comes to incorporating stone into your home.

STONE HEAVEN; Philippa Gerrard looks at why we should use more natural stone in modern interior design

The columns are made of an igneous rock called basalt.

Earth Rocks! Check out five extraordinary rock formations

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.

Nondescript rock marks PH navel

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.

Why two volcanoes in Hawaii are so close, but so different

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.

In United States, the Midwest Is Most Vulnerable to Space Weather

To the west and eastern border lies igneous rock that forms the main range granite and boundary range granite, respectively [16].

Identification of Rocks and Their Quartz Content in Gua Musang Goldfield Using Advanced Spaceborne Thermal Emission and Reflection Radiometer Imagery

The potash feldspar is essential minerals of granite an igneous rock.

Mineralogical Investigation of the Bara Formation from Lakhra Anticline, Sindh province, Pakistan

These are fictitious players with names such as Igneous Rock ("looks tough but has holes in his game").

Football, eh? It's a funny new game

(2) GEOLOGY Morales worked primarily with granite, which is an igneous rock. Obtain samples of sedimentary, igneous and metamorphic rocks.

Jesus Morales

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.

The Litchfield pluton in south-central Maine: Carboniferous alkalic magmatism in northern New England, USA