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cobble

Rock smaller than boulder and larger than gravel; arbitrarily 1 to 50 pounds or 2 to 8 inches in diameter. Substrate particles 64 to 256 mm (2.5 to 10 inches) in diameter. Often subclassified as small (64 to 128 mm) and large cobble (128 to 256 mm).


Selected cobble links:

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