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单词 rock flour
释义
rock flour

Geology and Earth Sciences
  • Finely ground rock debris produced chiefly by abrasion beneath a glacier. It may be removed by meltwater streams, which consequently develop a typically milky appearance.


Geography
  • Silt- and clay-sized particles of debris formed from grinding due to abrasion within and at the base of a glacier, and carried by meltwater streams.


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