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Meaning of black shale | Babel Free

Noun CEFR B2

Definitions

A dark, muddy rock, rich in sulfides and organic material.

countable, uncountable

Equivalents

Suomi musta savikivi

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

black sheep black shoe black sigatoka black silver black site black skimmer