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The Jersey Devil

Calvert Cliffs Shells - Modern/Fossil

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The Jersey Devil

Hi everyone,

I would like to ask about some brownies beach shells and corals from a while back.


I think the first 3 pics including the corals and Scaphopod are modern, but I want to make sure before I discard them.

 

The last two pics seem like fossils - is there an ID?

 

Thanks!

 

Modern??:
 

4E121AA9-20FC-4B71-A2C3-DDF48375FE32.jpeg

2AE1DAD0-B99B-47DF-B9A7-12D8B874C3A8.jpeg

17B6F6DA-DE8C-4DF6-9333-23EE6A454EE3.jpeg
 

 

 

Fossil??:

 

4CE5AE85-D33A-4E6B-A8C6-D4F62070DB55.jpeg

650539A8-4AE0-4DBC-B7C6-634309D89E5C.jpeg

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caldigger

Pictures not showing.

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hokietech96

I see them

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Jeffrey P

Those all look like typical Calvert marine fossils to me, the oyster, Pycnodonte percrassa. The corals are definitely fossils and it looks like you have a partial tusk shell, Dentalium attenuatum. Calvert Miocene shells can fool us into thinking they're modern because they usually have original shell material. I wouldn't discard those. 

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The Jersey Devil
25 minutes ago, Jeffrey P said:

Those all look like typical Calvert marine fossils to me, the oyster, Pycnodonte percrassa. The corals are definitely fossils and it looks like you have a partial tusk shell, Dentalium attenuatum. Calvert Miocene shells can fool us into thinking they're modern because they usually have original shell material. I wouldn't discard those. 


Interesting. I knew some of them were fossils because they have matrix attached but others I thought were modern.

 

Is the dentalium also fossil? Do you know what the fossil scallop species is?
 

The corals are actually from Flag ponds. I’ll have to sort them out.

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Jeffrey P

Dentalium would also be a fossil. The scallop shell is a Chesapecten. I'm not sure what species. Chesapeake Bay is primarily freshwater so it supports a lower diversity of mollusk species. Back in Miocene times however, the coastline was further west and north and this was a marine environment. The climate was milder too, more like Florida, hence the corals. 

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Rockwood
10 minutes ago, The Jersey Devil said:

Do you know what the fossil scallop species is?

Do it your self kit from the Museum there.

IMG_1683.JPG

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The Jersey Devil

Thanks guys.

Here is another curiosity from Matoaka Cabins. I think it’s a sand dollar, don’t know if it’s IDable though.

5A1DCFC6-0468-4D52-859E-C7E133C940AC.jpeg

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Rockwood
19 minutes ago, The Jersey Devil said:

Here is another curiosity from Matoaka Cabins.

Abertalla aberti

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The Jersey Devil

@Jeffrey P @Rockwood

 

I thought these were modern because they’re really light, what do you think? Also seem a little too well preserved.

687922BD-3E52-4134-A45A-E9C0078AEE6B.jpeg

8280EAD2-CD18-418D-9BA4-097B0C9D1C10.jpeg

A8BA4DD1-929D-4C28-A8D4-23D50D7DF339.jpeg

40A07482-5F92-4A98-B01B-888888D3D5B9.jpeg

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fossilnut

To me they appear to be fossil fish vertebrae. Modern one would be whitish in color. Excellently preserved. Note hand held is difficult to see. Photos on a plane background better light would aid in iD.

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The Jersey Devil
3 hours ago, fossilnut said:

To me they appear to be fossil fish vertebrae. Modern one would be whitish in color. Excellently preserved. Note hand held is difficult to see. Photos on a plane background better light would aid in iD.

Can the maryland ones be very light/not dense?

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Rockwood
16 hours ago, The Jersey Devil said:

I thought these were modern because they’re really light, what do you think? Also seem a little too well preserved.

Fish bone is not as heavy as say the fossil marine mammal bones found there. Modern bone does stain dark in the bay because of the ironstone present though.

These appear to be fossils. But if they seem pliable at all I might have to change that opinion.

A tooth tap test may be informative.

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The Jersey Devil
19 hours ago, Rockwood said:

Fish bone is not as heavy as say the fossil marine mammal bones found there. Modern bone does stain dark in the bay because of the ironstone present though.

These appear to be fossils. But if they seem pliable at all I might have to change that opinion.

A tooth tap test may be informative.


They’re as light as I would expect a modern one to be. They also have a bit of white showing I think.

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The Jersey Devil

@MarcoSr

Do you possibly have any insight on these fish vertebrae? Are modern stained vertebrae found pretty often at the cliffs?

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Rockwood

As distasteful as it is, you may have to burn test it. You know, the old stink check. :wacko:

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MarcoSr
6 hours ago, The Jersey Devil said:

@MarcoSr

Do you possibly have any insight on these fish vertebrae? Are modern stained vertebrae found pretty often at the cliffs?

 

Modern fish bony parts stain very quickly brown to black.  Typically if you see any white at all they are modern.  If they are soft, pliable and light weight they are modern.  Usually modern fish bones retain a smell for a good while.  Put them right up to your nose and smell them.  If there is any odor at all they are modern.  From the below picture, the first vertebra looks modern.  The second like it could be fossilized.

 

 

image.png.c03add3fd00a357c740c76ec3caa6985.png

 

 

Marco Sr.

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