Sand Black (English: black sand) is a black sand sediments that accumulate on the beach. With the formation of black sand that is resistant to rot, decay. And dense than quartz. A beach with a wave large enough to blow out an object that is less dense than go out. The material is thicker than I would have been swept away or continue to fall more slowly build up to that. Accumulate until a beach with black sand deposits, mainly. Black Sand may be caused by the deposition of sediments from the rock fracture origin. I was swept away beach deposits (placer deposit) or may be caused by contact with hot lava flowing into the sea sudden. Cause violent explosions (steam explosion or littoral explosion) causing sand accumulation and was swept away into a black sand beach.
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