igneous rock

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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.
Electronic auction: supply of crushed stone from igneous rocks of fraction 5-20 for the needs of the head office of mo "mosavtodor", lot # 4
Smit and his fellow researcher Klaus Mezger looked at over 48,000 shale and igneous rocks from around the world, each of them dating back billions of years, and looked closely at their geochemistry.
The area is an uplifted block of Precambrian igneous rocks named as the Nagar Parkar Igneous Complex (NPIC).
Additionally, the new age constraints provided by our U-Pb work allow us to make connections with other alkaline igneous rocks of broadly similar age in the northern Appalachian orogen and place constraints on the tectonic setting of the region at the time of intrusion.
Showing Measured UCS values based on this study, and comparison of predicted UCS values based on current study and work by previous studies for igneous rocks using VP of validation samples.
Study author Dr Liam Herringshaw, of Durham University's Department of Earth Sciences, said the geology of Northumberland National Park was a mixture of sedimentary rocks such as sandstone, limestone and shales - the types which can contain oil and gas - and igneous rocks created by volcanic activity and at-depth molten magma, which are of no interest to fracking prospectors.
Highlighting mineral potential in Punjab sources reveal that in the province igneous rocks and sedimentary rocks are available which can be used as building stone.
the crust, mantle, tectonic plates, metamorphic and igneous rocks and finally the core.
In areas that these units are located in the vicinity of kfl sometimes the intrusion of igneous rocks and limestone also be seen locally.
The investigation of such rocks, when formed by igneous clasts, permits direct geochronology and petrology studies that help improve the stratigraphic knowledge and location of possible source areas by comparing igneous clasts with known igneous rocks nearby.
The meteorites are igneous rocks that formed on Mars, were ejected into space when an asteroid or comet slammed into the red planet, and landed on Earth.