Definition of mudstone in English:

mudstone

Syllabification: mud·stone
Pronunciation: /ˈmədˌstōn
 
/

noun

A dark sedimentary rock formed from consolidated mud and lacking the laminations of shale.
More example sentences
  • The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite.
  • The matrix varies in composition from black shale to carbonate mudstone and quartzose siltstone.
  • The upper contacts are mostly sharp and overlain by interbedded mudstone, dark brown mudstone, laminated mudstone and occasionally fine-grained sandstone.

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Word of the day conspicuous
Pronunciation: kənˈspɪkjʊəs
adjective
clearly visible