Rocks Information and Facts | National Geographic

The seafloor is formed of a dark lava called basalt, the most common volcanic rock. Basalt is also found in volcanic lava flows, such as those in Hawaii, Iceland, and large parts of the U.S ...

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History of Basalt | Basalt, CO - Official Website

History of Basalt. Basalt began as a railroad town and was known as Aspen Junction until 1895, when the name was changed to Basalt. This name was taken from the basaltic rock formation of Black Mountain (now known as Basalt Mountain) located to the north of the town. The original settlement was actually called Fryingpan Town and was located on ...

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Basalt | Some Meteorite Information | Washington ...

Basalt is one of the most common rock types on Earth. Except for the coral, nearly all of the rocks of Hawaii are basalts. Much of Oregon and Idaho is covered with basalt. Basalt cobbles are commonly found on beaches, especially on volcanic islands (Hawaii, top). Most of the dark rocks in the bottom photo are basalts (Lake Superior).

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Basalt rock - ScienceDaily

Basalt is a common gray to black volcanic rock. It is usually fine-grained due to rapid cooling of lava on the Earth's surface. It may be porphyritic containing larger crystals in a …

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Basalt Rock | Formation, Properties, Composition, Uses

Basalt has a strict chemical definition. It is defined in the TAS diagram shown above. Basalt is an igneous rock that contains more than 45 and less than 52% of SiO2 and less than five percent of total alkalies (K2O + Na2O)3. Types of Basalt Basalt types: tholeiites vs alkali basalts. Tholeiitic basalt …

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Basalt Rock | Formation, Properties, Composition, Uses

Basalt has a strict chemical definition. It is defined in the TAS diagram shown above. Basalt is an igneous rock that contains more than 45 and less than 52% of SiO2 and less than five percent of total alkalies (K2O + Na2O)3. Types of Basalt Basalt types: tholeiites vs alkali basalts. Tholeiitic basalt is relatively rich in silica and poor in ...

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Basalt: Igneous Rock - Pictures, Definition, Uses & More

What is 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.The difference between basalt and gabbro is that basalt is a fine-grained rock …

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Basalt Facts - Softschools.com

Basalt Facts. Basalt Facts. Basalt is Earth's most abundant bedrock, and a very important rock. The Earth's ocean basins are underlain by basalt, but it is less common on continents. However, lava flows and flood basalts underlie several percent of Earth's land surface. It is an igneous rock and is usually fine-grained and dark-colored ...

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Basalt: Igneous Rock - Pictures, Definition, Uses & More

Basalt is one of the most common rock types on Earth. Except for the coral, nearly all of the rocks of Hawaii are basalts. Much of Oregon and Idaho is covered with basalt. Basalt cobbles are commonly found on beaches, especially on volcanic islands (Hawaii, top). Most of the dark rocks in the bottom photo are basalts (Lake Superior).

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Basalt - Wikipedia

Basalt (UK: / ˈ b æ s. ɔː l t,-əl t /; US: / b ə ˈ s ɔː l t, ˈ b eɪ ˌ s ɔː l t /) is an aphanitic extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon.More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt …

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Basalt Rock Properties and Uses - Science Struck

Basalt is a finely granulated igneous rock, which is usually black or gray in color. Most basalt rocks are primarily composed of the minerals pyroxene and feldspar. These rocks are formed due to lava flow. It is a type of rock that is abundantly found in the crust of the Earth, and although now found very commonly on land, most ocean floor ...

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8 Facts about Basalt | Fact File

Facts about Basalt 7: Boninite. If you want to know the type of basalt which has high amount of magnesium, you need to look at boninite. The titanium content of this rock is very low. Facts about Basalt 8: the uses of basalt. There are various kinds of basalt usage. The columnar basalt is used to create cobblestone.

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Basalt: Mineral information, data and localities.

A mafite or basaltoid containing mostly calcic plagioclase, clinopyroxene +/- olivine, orthopyroxene, foids, oxides and rarely quartz. A general term for fine-grained, mafic (dark-colored) igneous rocks, commonly extrusive (volcanic) but locally intrusive (e.g., as dikes or pipes), composed chiefly of plagioclase and clinopyroxene; the fine-grained equivalent of gabbro.

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Basalt | Encyclopedia.com

Basalt. Basalt is a mafic volcanic rock consisting primarily of plagioclase feldspar and pyroxene minerals.Common accessory minerals can include other pyroxenes, olivine, quartz, and nepheline.Basalt is the volcanic equivalent of the plutonic rock gabbro, and as such has a low silica content (48% – 52%). Like other volcanic rocks, basalt cools quickly after it erupts and therefore …

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Basalt - Igneous rocks

Basalt is a major rock type that occurs in virtually every tectonic setting. Basalt is clearly the most common volcanic rock on Earth and basaltic rocks (including gabbro, diabase and their metamorphosed equivalents) are the most common rocks in the crust 2.Basalt is also common on the Moon and other rocky planets of the Solar System.

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basalt | Definition, Properties, & Facts | Britannica

Basalt, extrusive igneous (volcanic) rock that is low in silica content, dark in color, and comparatively rich in iron and magnesium. Basalts may be broadly classified on a chemical and petrographic basis into two main groups: the tholeiitic and the alkali basalts. Learn more about basalt in this article.

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