Black shales are especially abundant from the Late Devonian to Mississippian in North America.

Name: Black shales are especially abundant from the Late Devonian to Mississippian in North America.
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Black shales are indeed abundant from the Late Devonian to Mississippian in North America, particularly in regions such as the Appalachian Basin and the western interior seaway. These shales are important sources of hydrocarbons and other minerals.

Black Shales Are Especially Abundant from the Late Devonian to Mississippian