Definition of black sand
(Entry 1 of 2)
: dark-colored sand a black sand beach Along the coast the sea gnaws at the twisted lava, and eventually reduces it to “black sand.”— Cheryl Simon, Science News, 9 July 1983 specifically : dark sand containing small fragments of magnetite usually found as part of an geological deposit Slow down as black sand begins to accumulate in the bottom of the pan, and watch for any gold that might move up toward the rim of the pan. — Alan M. Cvancara, A Field Guide for the Amateur Geologist, 1995
Note: Deposits of black sand are often signs of valuable resources such as gold, rare earth elements, or gems.
Definition of Black Sand (Entry 2 of 2)
: of or relating to a component of Woodland culture and a physical type first found in central Illinois
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