Basalt (UK: / ˈ b æ s ɒ l t,-ɔː l t,-əl t /; [1] [2] US: / b ə ˈ s ɔː l t, ˈ b eɪ s ɔː l t /) [3] is an aphanitic (fine-grained) 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 ...

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 …

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.

2023年4月23日 · Basalt is one of the most common rock types on Earth, and it can be found in various locations around the world, both on land and under the ocean floor. Basalt is known for its dark color, typically ranging from black to dark gray, and its fine-grained texture.

Explore the strength and versatility of basalt, a volcanic rock with widespread uses in construction, industrial applications, and art. Learn about its formation, types, famous locations, and how to care for basalt in this detailed guide.

Basalt is defined as a fine-grained, dark-colored igneous rock composed mainly of plagioclase and pyroxene minerals, with or without olivine. It is formed from the rapid cooling of basaltic lava exposed at or very near the surface of the Earth (extrusive or volcanic rock).

Basalt is a dark-colored, dense rock composed primarily of plagioclase feldspar and pyroxene. It is the most common rock type found in oceanic crust and is an important component of the Earth’s continental crust.

Basalt is a type of intrusive rock meaning it forms inside of the volcano. Basalt has also formed on Earth's Moon , Mars , Venus , and even on the asteroid Vesta . The crustal portions of oceanic tectonic plates are made mostly of basalt, produced …

Basalt is a fine-grained, dark-colored igneous rock that forms from the rapid cooling of lava at or near the Earth's surface. It is the most common type of volcanic rock and is primarily composed of plagioclase feldspar and pyroxene, giving it a distinctive texture and mineral composition.

2018年5月8日 · 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 generally contains less than 50% visible crystals floating in a matrix of glass or microscopic crystals.