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York River Find #3


BayFinds

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Here’s another one from the York Tiver today, if anyone can help ID. thanks!

912AD970-7423-410C-A1C4-E8CE555B9BE0.jpeg

256AB1C8-AAD9-49C1-B4E5-8AD0C853CB0A.jpeg

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Can We see pictures of all sides?

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Really not sure about this one, thinking some type of clam(?).

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I’m thinking it is a type of oyster, but the 2nd pic seems a bit off for an oyster. That said I have seen some weird oysters.

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The outer cone is a smoother texture and then there is a stonier texture filling it and coming out the wider end. Could it be some sort of tube worm? 

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The smother area is where the shell is or was (dependent on how You look at it), the grainy gray is the mud that filled the shell (when it was buried). 

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12 minutes ago, ynot said:

The smother area is where the shell is or was (dependent on how You look at it), the grainy gray is the mud that filled the shell (when it was buried). 

Oooh. Ok. 

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3 minutes ago, BayFinds said:

Oooh. Ok. 

The problem with getting an ID on this is the state of wear. It may be too worn to get much beyond it is shell.

There were some weird snails out there too.

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The filling may be shale. Shale can be broken down with 5% vinegar, but you’d want to make sure the shell wasn’t reacting. 

The narrow open end is a bit odd looking for an oyster. It could be a tube worm case

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The shale would have to be significantly calcareous to react to vinegar.

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I'm not sure if these are the same, but they are common in one stretch of the river. 

IMG_4904.JPG

IMG_4902.JPG

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It has a close resemblance with Teredolites or with Gastrochaenolites.

 

0038_foldrajz_Oslenytan-DavidArpad.jpg.65f63bdbe6c5804329a916f220d5278b.jpg

picture from here

 

P837217.thumb.jpg.cbd711813e28d58b318b22239856b808.jpg

picture from here

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abyssunder nailed it

  the broken thick end is a section through the steinkern of the boring clam that made the gastrochaenolites

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On 10/8/2018 at 7:30 PM, abyssunder said:

It has a close resemblance with Teredolites or with Gastrochaenolites.

 

0038_foldrajz_Oslenytan-DavidArpad.jpg.65f63bdbe6c5804329a916f220d5278b.jpg

picture from here

 

P837217.thumb.jpg.cbd711813e28d58b318b22239856b808.jpg

picture from here

Yes! This is it! 

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On 10/7/2018 at 10:47 PM, Kane said:

The shale would have to be significantly calcareous to react to vinegar.

NSR shale/clay breaks down nicely in vinegar. Sometimes it is halfway between a shale and very hard clay. 

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15 hours ago, Plax said:

abyssunder nailed it

  the broken thick end is a section through the steinkern of the boring clam that made the gastrochaenolites

Which makes for quite a unique and instructive find in my opinon.

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9 hours ago, BayFinds said:

Is this considered a trace fossil?

the clam is a steinkern of a clam fossil and the gastrochaenilite a trace

  As Ludwigia stated; an instructive find

  You may be able to get a likely but not certain species for the clam by googleing "yorktown formation pelecypoda"

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7 hours ago, Ludwigia said:

Which makes for quite a unique and instructive find in my opinon.

Well, thank you to everyone. This has to be the most helpful and fastest responding forum ever! I’ve learned a lot from this little fossil, and I’m  excited to share the info with my two boys. . . and get them to research the type of clam that left it!

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17 hours ago, BayFinds said:

Is this considered a trace fossil?

Yes, it is.
You have a nice specimen. Thank you for posting it here. :)

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