Pebble - Wikipedia, the free encyclopedia

Pebble - Wikipedia, the free encyclopedia

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日期:2025-10-07
A pebble is a clast of rock with a particle size of 2 to 64 millimetres based on the Krumbein phi scale of sedimentology. Pebbles are generally considered larger than granules (2 to 4 millimetres diameter) and smaller than cobbles (64 to 256 millimetres d...看更多