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Questions tagged [graptolites]

Use when discussing these important Paleozioc index fossils, or the animals that formed them.

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How do we know graptolites were pelagic?

How do we know that graptolites were pelagic, and not benthic, creatures? I understand it has something to do with their being found in black shale, but I'm not sure why that is particularly relevant.
Samuel Front's user avatar