Punalu'u Black Sand Beach

Hawaii, U.S

Black sand beach is located on the hawaiian islands of the united states. 19.136'N 155.504'S

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The beach is close to the inside of the plate, and its close to tectonic activity so it's an active coast
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Hawaii was created with volcanic forces so its a secondary coast. The islands have been rising since they were created by volcanoes, it is an emergent coast.
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The color of the beach's sand is black from the volcanic rock, the rock its made from is basalt due to lava cooling rapidly in the ocean
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Its famous for having black sands. The lands around is very mountainous with volcanoes. The water is dangerous to swim in because it is very rocky