black shales

A form of black shale — A dark, muddy rock, rich in sulfides and organic material.

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Meanings

noun
  1. pluralplural of black shale
Cite this entry
APA

black shales. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/black%20shales

MLA

“black shales.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/black%20shales. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “black shales,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/black%20shales.

Source: black shales on Wiktionary, CC BY-SA 4.0.