are these from Calvert Cliffs?

[jpc]

Hi folks (especially you folks on the east coast)...

We got a donation of fossils form a local collector.  He had a few Chesapecten and snail casts labeled as from the "Maryland Shore".  I am sure the scallops come from the Calvert Cliffs area, but are snail casts known from this area?  Or anywhere on the Maryland shore?  below are pix.

[Troodon]

Definitely out of my area of expertise.  I don't recall finding molds on the cliffs and added picture of the kind of material found.   I did find molds at Purcell State Park on the Potomac which is Paleocene.  That's all I can add to your question.

[Metopocetus]

Those snail casts don't look like the ones we typically find around here. Both the type of snail and the preservation don't look right.

[dre464]

Perhaps the collector took a trip out here to central Texas.  The first has the look of a Tylostoma tumidum steinkern.  The second I'm less familiar with.  Natica sp. perhaps??