mudstone

Etymology
From.

Noun

 * 1)  A fine-grained sedimentary rock whose original constituents were clays or muds.

Translations

 * Chinese:
 * Mandarin:
 * Finnish: lietekivi, mutakivi
 * Irish: láibchloch
 * Italian:
 * Japanese: 泥岩
 * Serbo-Croatian: muljnjak
 * Spanish: fangolita