ID please - teardrop shapes fossil - Calvert Cliffs formation (Miocene)

[Little_Bird]

Hey friends, pulled this one from the surf at Flag Ponds Nature Park in Maryland. Flag Ponds is part of the Miocene era Calvert Cliffs formation on the Chesapeake Bay. 

 

Nickel for scale. It’s solid and heavy, teardrop in shape.

 

Best guess from an internet search is a fossilized lingula brachiopod, but I can’t find many loose fossils, just ones still set in matrices. 

 

Any and all help is appreciated!

 

[ynot]

Fish tilly bone.

[Auspex]

To me, that is an iconic fossil of the Calvert Fm.; it is surprising how many I found there over the years, and back then I had no idea what they were.

LINK

[Miocene_Mason]

56 minutes ago, Auspex said:

To me, that is an iconic fossil of the Calvert Fm.; it is surprising how many I found there over the years, and back then I had no idea what they were.

LINK

Strangely I’ve found none, must think they are nuts and pass them by!

[Coco]

Just for your information : we are many foreign members on this forum and we don't know the size of a nickel ! use a rule or gives directly the size in cm or in inch, then we shall manage !

 

Coco

[Miocene_Mason]

On 7/9/2018 at 9:25 PM, WhodamanHD said:

Strangely I’ve found none, must think they are nuts and pass them by!

Spoke too soon, this changed two days ago.