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I spotted this large striped rock found on Delaware River. Note the fossil in the first picture. What kind of rock is this?

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closed as off-topic by Jan Doggen, user12525, Fred, Erik, arkaia Aug 29 at 11:54

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, Community, Fred, Erik, arkaia
If this question can be reworded to fit the rules in the help center, please edit the question.

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The boulder appears to be dark grey fossiliferous limestone or dolostone with softer tan layers which might be: limestone or calcareous claystone/siltstone/sandstone. From the photo, the tan layers do not appear to be shale.

I have a hand specimen which is very similar from southern New Jersey. It is harder grey limestone inter-layered with light tan calcareous siltstone. enter image description here

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