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{%type%} Definitions

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n. - A fine-grained rock of consolidated mud or clay deposited by a river or lake.

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Usage examples (37)
  • Ancient mud deposits harden over geological time to form sedimentary rock such as siltstone or solid, mudrock lutites.
  • Age assigned to dredged siltstone samples and piston core samples.
  • The prehistoric "tool" was reassembled from 14 fragments of siltstone.
  • The region occurs on sandstone, siltstone, shale, and limestone substrates.
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