mud·stone (m d st n )n. A fine-grained, dark gray sedimentary rock, formed from silt and clay and similar to shale but without laminations. |
mudstone [ˈmʌdˌstəʊn]
n
(Earth Sciences / Geological Science) a dark grey clay rock similar to shale but with the lamination less well developed
| mudstone (mdstn) A fine-grained, dark gray sedimentary rock consisting primarily of compacted and hardened silt and clay, similar to shale but without laminations. The proportions of silt and clay in mudstone are approximately equal. |
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