Basaltic definition
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- By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.Basalt features a glassy matrix interspersed with minerals.asalt is one of the most common rock types in the world. Basalt is the rock most typical of large igneous provinces. The largest occurrences of basalt are in the ocean floor that is almost completely made up by basalt.
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- Basalt is a type of volcanic igneous rock that forms outside of the earth and is used for different purposes in construction. Discover how basalt is used as a major component of asphalt for roads with help from a science tutor and field biologist in this free video on basalt and chemistry.o, basalt is a type of volcanic rock. It's also an extrusive volcanic rock which simply means that it formed outside of the earth. So, it cools, it gets ejected or it goes out into the surface of the earth and cools in air.
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Difference Between Basalt and Granite Basalt is an extrusive igneous rock, whereas granite is an intrusive ingenuous rock. Those who do not know, extrusive rocks are those formed of lava coming out of volcanoes, whereas rocks formed of magma that has yet not come out of the volcano are termed as intrusive rocks. Basalt is darker and is composed of magnesium and iron, whereas granite is lighter and is made up of feldspar and quartz. • Basalt is called mafic, while granite is called felsic. • Basalt splits along columnar planes, while granite splits along horizontal planes.
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- Basalt a mafic extrusive rock, is the most widespread of all igneous rocks, and comprises more than 90% of all volcanic rocks. Because of its relatively low silica content, basalt lava has a comparatively low viscosity, and forms thin flows that can travel long distances.
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Igneous Rocks: How Are They Formed? If the cooling of the lava happened more slowly, the rocks would be fine-grained or porphyritic – where the crystals differ in size, with at least one group of crystals obviously larger than another group. Basalt is a common form of extrusive igneous rock and forms lava flows, lava sheets and lava plateaus.
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- 1 A form of lava flow of basaltic rock, usually dark-colored with a smooth or ropey surface. It is one of two chief forms of lava flow emitted from volcanoes of the Hawaiian type, the other form being aa.  1859, R. C. Haskell, American journal of science and arts, series XXVIII:
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Geology Glossary - Definitions of Geologic Terms Definition of mafic. : of, relating to, or being a group of usually dark-colored minerals rich in magnesium and iron.
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The Rock - Basalt The Rock - Basalt. Basalt is a very common igneous rock. In fact it is the most common rock in the Earth's crust. Almost all oceanic crust is made of basalt and basalt is a common extrusion from many volcanic regions around the world. It forms from the melting of the upper mantle and its chemistry closely resembles the upper mantle's composition.
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- Basaltic lava, or mafic lava, is molten rock enriched in iron and magnesium and depleted in silica. Basaltic magmas are formed by exceeding the melting point of the mantle either by adding heat, changing its composition, or decreasing its pressure.
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- Alkali feldspar granite-a granitoid in which at least 90% of the total feldspar is in the form of alkali feldspar. Anorthosite-an intrusive igneous felsic rock composed predominantly of plagioclase. Aplite-a very fine grained intrusive igneous rock composed of quartz and feldspar.Basalt-a volcanic rock of mafic composition. Adakite-a class of basaltic rocks containing low amounts of yttrium and ytterbium. Hawaiite-a class of basalts formed from ocean island (hot spot) magmatism.plite-a very fine grained intrusive igneous rock composed of quartz and feldspar. Basalt-a volcanic rock of mafic composition. Adakite-a class of basaltic rocks containing low amounts of yttrium and ytterbium. Hawaiite-a class of basalts formed from ocean island (hot spot) magmatism.
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- Basalt is a fine grained VOLCANIC igneous rock of mafic composition typically made up of the minerals olivine, clino-pyroxene and calcium rich plagioclase.It is the product o … f undifferentiated magma at either constructive or destructive plate margins.asalt is a fine grained VOLCANIC igneous rock of mafic composition typically made up of the minerals olivine, clino-pyroxene and calcium rich plagioclase.
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- Basalt is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes, so it's one kind of igneous rock. When the lava cools quickly, it turns into basalt. Usually basalt is black or gray. Basalt is a mixture of feldspar and pyroxene, a rock made mainly of silica and oxygen.hen the lava cools quickly, it turns into basalt. Usually basalt is black or gray. Basalt is a mixture of feldspar and pyroxene, a rock made mainly of silica and oxygen.
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- /bəˈsɔːlt/ , /ˈbaesɒlt/ , /ˈbæsɒlt/ , ˈbaesɔːlt /ˈbæsɔːlt/) or ˈbeɪsɔːlt is a common (extrusive) igneous volcanic rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet. Or moon flood basalt describes the formation in a series of lava. basalt flowsasalt is one of the most common rock types in the world. Basalt is the rock most typical of large igneous provinces. The largest occurrences of basalt are in the ocean floor that is almost completely made up by basalt.
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Basalt Rocks Basalt is an extrusive igneous rock that is very dark in color. It is the most common type of rock in the Earth's crust and it makes up most of the ocean floor.
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Basalt Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro.asalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro.
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Basalt Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro.he difference between basalt and gabbro is that basalt is a fine-grained rock while gabbro is a coarse-grained rock. Basalt underlies more of Earth's surface than any other rock type. Most areas within Earth's ocean basins are underlain by basalt.
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Talk:Basalt By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.Basalt features a glassy matrix interspersed with minerals.asalt which erupts under open air (that is, subaerially) forms three distinct types of lava or volcanic deposits: scoria; ash or cinder (breccia); and lava flows. Basalt in the tops of subaerial lava flows and cinder cones will often be highly vesiculated, imparting a lightweight frothy texture to the rock.
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basalt the dark, dense, igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure. [1595–1605; < Latin basaltēs < Greek basanitēs=básan(os) touchstone (ultimately < Egyptian bhn(w) graywacke) + -ītēs -ite1]
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- SURFACE STRUCTURE. Basaltic lava flows erupt primarily from shield volcanoes, fissure systems, scoria cones, and spatter cones. These fluid lava flows can be subdivided into two end-member structural types, based primarily on the nature of lava flow surfaces: 1  Pahoehoe Lava -- Surfaces are smooth, billowy, or ropy.
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basalt A dark, fine-grained, igneous rock consisting mostly of feldspar, iron, and magnesium. Basalt makes up most of the ocean floor. It commonly forms when volcanic lava becomes solid. See Table at rock. dark, fine-grained, igneous rock consisting mostly of feldspar, iron, and magnesium. Basalt makes up most of the ocean floor. It commonly forms when volcanic lava becomes solid. See Table at rock.
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Ask GeoMan... Basalt is extrusive. The magma from which it cools breaks through the crust of the earth and erupts on the surface. We call these types of events volcanic eruptions, and there are several main types.The volcanoes that make basalt are very common, and tend to form long and persistent zones of rifting in nearly all of the ocean basins.ranite is great stuff! Not only is it my personal favorite, it is without a doubt the most common rock type on the continental land masses. Yosemite Valley in the Sierra Nevada and Mt. Rushmore are two notable examples of granitic rocks.
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- A course grained ultramafic intrusive igneous rock composed of olivine and small amounts of pyroxene and amphibole. The dominant rock in the Earth's mantle and the source rock of basaltic melts. ultramafic/intrusive.
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Basaltic Magma Eruption? Answers. Best Answer: Basalt eruptions are most prevalent in oceanic eruptions, at sea floor spreading zones and formation of island arcs. Felsic eruptions, which are typically granitic or rhyolytic, are more common in continental eruptions.The predominant eruptions are oceanic, so basaltic eruptions are more common.A theory of the evolution of a volcano maintains that eruptions of young volcanoes start out basaltic and become more and more felsic as the volcano matures. This is thought to be to magma differentiation and fractionation. Source(s):elsic eruptions, which are typically granitic or rhyolytic, are more common in continental eruptions. The predominant eruptions are oceanic, so basaltic eruptions are more common.
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- Basalt is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes, so it's one kind of igneous rock. When the lava cools quickly, it turns into basalt.Usually basalt is black or gray. Basalt is a mixture of feldspar and pyroxene, a rock made mainly of silica and oxygen.asalt is pretty common on Earth, and there is also a lot of basalt on the Moon, and on other planets including Mars and Venus. Like granite, basalt is a very hard rock. Because it is a common rock and so hard, people used basalt for early choppers and for grinding stones for grinding grains like millet and barley.
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- By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.Basalt features a glassy matrix interspersed with minerals.y definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.
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Types of Igneous Rocks (Chapter 4) (Phaneritic) an igneous rock texture in which the crystals are roughly equal in size and large enough so the individual minerals can be seen easily Diorite grey to dark grey intermediate intrusive igneous rock composed of plagioclase feldspar, biotite, hornblende, and/or pyroxene Extrusive Igneous activity that occurs at Earth's surface