Basalt (UK: / ˈbæsɒlt, - ɔːlt, - əlt / ⓘ BAH-salt); [1][2] US: / bəˈsɔːlt, ˈbeɪsɔːlt / ⓘ buh-SALT) [3] is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low- viscosity lava …

6 days ago · The meaning of BASALT is a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite.

May 15, 2026 · 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 …

Jan 28, 2026 · Basalt is the most abundant volcanic rock on Earth, covering more than 90% of the ocean floor and large continental regions shaped by ancient lava flows. It forms when mafic magma, …

BASALT definition: the dark, dense igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure. See examples of basalt used …

Basalt typically has a low silica content relative to other igneous rocks, and due to its composition and rapid cooling process, it often has a fine or aphanitic texture, meaning the crystals are too small to be …

Aug 17, 2023 · Basalt is a common and widely used, fine-grained, dark-colored mafic volcanic rock. It has mainly calcic plagioclase feldspar and augite.

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 …

BASALT definition: 1. a type of black rock that comes from a volcano 2. a type of black rock that comes from a volcano…. Learn more.

Basalt gets its name from late Latin basalts, which is a misspelling of Latin basanites meaning hard stone. Rarity, Value & Variations: Basalt is a stone that underlies more of the Earth's surface than …