noun ba·salt \bə-ˈslt, ˈbā-ˌ\

: a type of dark gray to black rock

Full Definition of BASALT

:  a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite
ba·sal·tic \bə-ˈsl-tik\ adjective

Origin of BASALT

Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egyptian bḫnw
First Known Use: 1601

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale


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