Black shale (Q41294)

From geokb
Revision as of 13:01, 12 May 2023 by Sky (talk | contribs) (‎Changed an Item: Moved Mindat rock identifier to instance of claim as qualifier)
A shale with at least 1% carbonaceous material indicating a reducing environment
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Black shale
A shale with at least 1% carbonaceous material indicating a reducing environment

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