mudstone

[ muhd-stohn ]
/ ˈmʌdˌstoʊn /

noun Geology.

a clayey rock with the texture and composition of shale but little or no lamination.

Origin of mudstone

First recorded in 1730–40; mud + stone

Words nearby mudstone

mudskipper, mudslide, mudslinging, mudspate, mudspringer, mudstone, mudsucker, mudéjar, muehrcke's lines, mueller, mueller electronic tonometer

British Dictionary definitions for mudstone

mudstone
/ (ˈmʌdˌstəʊn) /

noun

a dark grey clay rock similar to shale but with the lamination less well developed

Scientific definitions for mudstone

mudstone
[ mŭd′stōn′ ]

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.