1. A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance. 2. A kind of hard unglazed pottery. (http://www.thefreedictionary.com/basalt)
06:59, 17 September 2013
From google: Basalt is a common extrusive igneous rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet or moon.
11:11, 28 June 2013
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