mudstone

[ muhd-stohn ]

noun

, Geology.

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

mudstone

/ ˈmʌdˌstəʊn /

noun

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

mudstone

/ mŭd′stōn′ /

1. 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.

Word History and Origins

Origin of mudstone¹

First recorded in 1730–40; mud + stone

Example Sentences

Their remains are primarily preserved as carbon films in mudstone.

From Singularity Hub