Looks like Crepidula sp.

I’m inclined to say fossil due to what look like regular growth lines, but location, scale and views from other angles are needed.

Halysites coral

It is part of the outer lip of a mollusc, probably a helmet conch, Cassis sp.

Could be a fenestrate bryozoan.

Orthocone- concave on one end, covex on the other; overall shape tapering down to a point. It is a cephalopod, related to but not exactly a squid or octopus.

Not a tooth, broken piece of shell, probably oyster.

Part of an ammonite or baculite. You can see the dendrite shaped sutures that are characteristic.

Rock with tube made by a modern boring pholad clam.

Modern coral

A scale and pictures from other angles would definitely be helpful. One possibility is that it is a partial fragment of the ventral edge of a bivalve or brachiopod shell. Again, a scale and another view looking down the dorsal-ventral axis showing the undulations of the shell could help confirm that.

@mackenzie-smith Thanks! Further preparation may reveal more of it, but I’ve held out so far since I don’t have experience with this matrix.

@bill-heim Thanks!

@mackenzie-smith At this locality, I found 3 distinct fossil bearing zones. At the bottom is a carbonized zone resembling lignite. Above the lignite layer is a compressed vegetation layer, which is where this specimen is from. Above this is a gray fine-grained mudstone which is where the fern came from. Above that layer is a tan sandstone layer…[Read more]

@mackenzie-smith No worries, thanks for the ID! It is late Campanian (73 mya) according to: https://naturalhistory2.si.edu/ETE/ETE_People_Wing_ResearchThemes_BCR.html I’m terrible with botany, what would be the taxonomic name for ferns?

@bill-heim Not sure what this is, the shape reminds me of an Isurus sp. type tooth, but I don’t remember ever seeing them with serrations.