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.
The igneous rock includes the Whin Sill, a major feature of the Northumbrian landscape.
Here is Craig's winning list of words, their meanings and the points they gained him: Ventrous - adventurous (65) Gaieties - state of joyful exuberance or merriment (62) Diorite - igneous rock (68) Umu - Polynesian earth oven (24) Zit - spot (36) Kaw - Alternate word for Kansa, a member of a North American Indian people formerly of eastern Kansas, now living mostly in northern Oklahoma (34) Gleet - inflammation of the urethra with a slight discharge of thin puss and mucus (24) Villa - (especially in continental Europe) a large and luxurious country house in its own grounds (14) Talaq - Type of Muslim divorce (42) Gapo - South American forest near a river (27) Barfs - an attack of vomiting (26)
Other words played in the final game included ventrous, meaning adventurous, scoring 65, gleet, meaning inflammation of the urethra, scoring 24, and diorite, meaning igneous rock, scoring 69.
The most extensive lava on the left abutment of the dam site and downstream of the dam is seen as a monolithic igneous intrusion but in other areas of the layers of limestone and radiolarian and sometimes grains of igneous rock is found in the other layers.
The only natural surface I can think of that carries anything like the look of distressed age--embedded in Bull's tough, wrinkled hide--is the igneous rock of Ontario's Lake Temagami, which is pocked with lichen that is thousands of years old and lined with the crevasses and faults left by the planet's distant molten past.
Information about the evolution of the Martian crust and deeper regions within the planet comes from Curiosity's mineralogical analysis of a football-size igneous rock called "Jake M.
The Siberian Traps eruptions created millions of square miles of new igneous rock, and released massive amounts of carbon dioxide into the atmosphere at the same time.
The igneous rock complex of the Timok region is being explored by other world mining companies as well.
In contrast to the highly oxidized and acidic material constituting much of the Martian surface, this rock sample is made of a fine-grained mudstone containing clay minerals, a product of interaction between fresh water and igneous rock.
Andesite is an aphanitic and extrusive igneous rock composed of the Na-rich plagioclase, pyroxene and amphibole.
The note adds: 'The hill is a dome-shaped mass of dolerite, a hard, grey/ black igneous rock formed underneath what was once the Dudley Volcano.