- of or relating to or containing basalt; "basaltic magma is fluid"
- (basalt) the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene
- Basalt (or) is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey.
- (basalt) A hard rock of varied mineral content; volcanic in origin, it makes up much of the Earth's crust; A type of unglazed pottery
- (Basalt) Volcanic rock (or lava) that characteristically is dark in color, contains 45 to 54 percent silica, and generally is rich in iron and magnesium.
- (basalt) a dense-textured (aphanitic), igneous rock relatively high in iron and magnesia minerals and relatively low in silica, generally dark grey to black, and feldspathic; a general term in contradistinction to felsite, a light-colored feldspathic and highly siliceous rock of similar texture ...
- (Basalt) Dark-colored, low-silica (less than 53 percent SiO2), low viscosity volcanic rock that is relatively fluid when molten; eruptions of basalt are generally non explosive and tend to produce relatively long thin lava flows like those common in Hawaii.
- (Basalt) A general term for dark-colored iron- and magnesium-rich igneous rocks, commonly extrusive, but locally intrusive. It is the principal rock type making up the ocean floor.
- (Basalt) A dark, fine-grained igneous rock formed by cooling of iron- and magnesium-rich lava above the surface of the earth. Basalt is the main component of the oceanic crust of the earth.
- (basalt) hard black volcanic rock formed by lava that has flowed from volcanoes or cracks in the Earth's crust and hardened. photo
- (basalt) (ba SAWLT) — type of rock formed when lava cools quickly
- (Basalt) Dark colored, fine-grained volcanic igneous rock.
- (basalt) a dense black or grey igneous rock
- (Basalt) 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. ...
- (Basalt (Basaltic Lava)) The least viscous (most runny) kind of lava. Basalt is black, reddish brown or gray when it cools. Sometimes you can see a few crystals (phenocrysts) spread out in a piece of basalt, but most of the minerals are often too small to see without help from a microscope.
- (Basalt (basaltic magmatism)) A type of igneous igneous rock with a basic composition. Strictly the term is used only for lavas, erupted at the earth's surface. ...
- (Basalt(ic)) Outcropping rocks of high heavy metal and zeolite content comprising the coastal hills of Cos. Antrim and Londonderry; drainage waters and derivative soils are of high base status
- (Basalt) (basaltes) A type of vitrified black stoneware developed by Josiah Wedgwood in the 1760s, inspired by ancient Greek pottery.
- (Basalt) A dark igneous rock. Basalt originates from lava that has extruded onto the surface of the Earth. Therefore the lava has cooled quickly, forming small crystals.
- (Basalt) A dark volcanic rock, often with a glassy appearance, composed chiefly of plagioclase, pyroxene, and olivine.
- (Basalt) A dark, dense volcanic rock difficult to shape.
- (Basalt) A fine-grained basic igneous rock occurring in dykes, sills and lava-flows; essential minerals are plagioclase felspar and augite. Dark grey to black in colour; relative density 2.8-3.3; aggregate crushing value 7-25.
- (Basalt) A fine-grained basic volcanic rock, which can be used in aggregate production, similar in composition to gabbros.
- (Basalt) A fine-grained, dense, igneous rock, but unlike granites contains little or no quartz or feldspars. The colors of basalts are very dark green to black and often sold as granites.
- (Basalt) A type of fluid magma with low silica content. Forms dark coloured rock (often red or black), such as the scoria cones of Auckland.