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basalt

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noun ba·salt \bə-ˈsȯlt, ˈbā-ˌ\

Simple Definition of basalt

  • : a type of dark gray to black rock

Source: Merriam-Webster's Learner's Dictionary

Full Definition of basalt

  1. :  a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite

basaltic

play \bə-ˈsȯl-tik\ adjective

Origin and Etymology of basalt

Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egyptian bḫnw


First Known Use: 1601


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