Definitions
Layered sedimentary rock formed from clay or mud.
Word origin
From Middle English schale (“shell, husk; scale”), from Old English sċealu (“shell, husk, pod”), from Proto-West Germanic *skalu, from Proto-Germanic *skalō, from Proto-Indo-European *(s)kelH- (“to split, cut”), from *(s)kel- (“to split, cleave”).
Used in a sentence
“the green shales of a bean”
“Mr. Lyell next visited the red and green shales of Cabotville, north of Springfield in Massachusetts, where some of the best Ornithichnites have been procured, chiefly in the green shale.”
“As on all large green roofs, the soil is not dirt exactly but a gravel-like growing medium of granulated pumice, shales, clays and other minerals.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Layered sedimentary rock”5 letters
Not quite right?
"Search similar patterns."
S____