Possible dried, cracked mud?

Yes crinoids

Agreed

I agree that it seems to be a rock.

I agree

I agree

Awesome picture! However I think this is a very dinosaur-looking rock not a fossil. However I could be wrong, @samantha-ocon or @jbauer could you help, thank you!

@charlotte-pierce As Oxford Languages says, it is a “a hard, dark, opaque rock composed of silica (chalcedony)”.

Chert possibly?

Maybe some more angles of the fossil would help. Thank you!

Thank you!

Also possibly some fenestrate bryozoan pieces?

Just curious, Could you tell me where you found this great fossil and your shrimp fossil as well?

Yes, I too think it’s a sea urchin! A “sand dollar”, class Echinoidea, and perhaps Order Clypeasteroida.

The ridges at the edge of your fossil seem to also match up to the edges of the various sections in the sea urchin pictured, but I’m not sure. Tagging in some people to help- @jbauer and @samantha-ocon could you take a look, thank you!

Do keep in mind this image is from Wikipedia, so it may not be as reliable, but the pictures do seem to match up. Link to image: https://en.m.wikipedia.org/wiki/File:Phyllacanthus_imperialis_test.JPG

Or it might be part of a cidaroid sea urchin “test” or shell, because I can see the big bump and little bumps around it being similar to the test of, say, a specimen of Phyllacanthus imperialis.

This picture is a bit blurry to make out the exact fossil, could you post another photo that is less blurry, thanks!

Possibly turtle shell?

Possibly some form of coral?