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MarielleK

Dark Colored Fish

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MarielleK

I have a few fish fossils here that are in a dark colored matrix. I do not know what species they are, nor how old. You can see scales preserved on them, which I think is pretty interesting. Any information about them would be very appreciated! Thank You!! 

image1.jpeg

image2.jpeg

image3.jpeg

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Fossildude19

Hello MarielleK,

 

Any idea where they are from?

 

Your first fish is a Semionotus sp. possibly from somewhere here in the north-east US. 

Your second one  is a Semionotus, as well.  It appears to be ventro-dorsally flattened. (On it's back, belly -up.) 
Both are very nice fossils!  :wub:  :envy: 

 

EDIT: Depending on where they come from, they could be  Late Triassic (Rhaetian) to Early Jurassic  (Hettangian) in age. 

(Between 204 million and 197 million years old.)

 

 

 

image1.jpeg.a9db494755362ac89543501eb3a72836.jpeg   image2.jpeg.f5fe7344fe6462483a19d705f0c8043a.jpeg

 

 

image3.jpeg.8eff0b002e2daa3f7314b3c09cd4a72f.jpeg

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MarielleK
On 1/8/2018 at 8:33 PM, Fossildude19 said:

Hello MarielleK,

 

Any idea where they are from?

 

Your first fish is a Semionotus sp. possibly from somewhere here in the north-east US. 

Your second one  is a Semionotus, as well.  It appears to be ventro-dorsally flattened. (On it's back, belly -up.) 
Both are very nice fossils!  :wub:  :envy: 

 

EDIT: Depending on where they come from, they could be  Late Triassic (Rhaetian) to Early Jurassic  (Hettangian) in age. 

(Between 204 million and 197 million years old.)

I think the guy who I got them from said they were found in Pennsylvania, but I could be wrong. 

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Tidgy's Dad

Lovely fossils! 

really detailed, fine fish. :)

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Fossildude19

Hmm. Well I'm not real familiar with Pennsylvania, but I believe that the Newark Basin exposes the Lockatong formation in PA. 

So it's possible, but the preservation looks (to me) more like either Connecticut or New Jersey. 

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WhodamanHD
4 minutes ago, Fossildude19 said:

Hmm. Well I'm not real familiar with Pennsylvania, but I believe that the Newark Basin exposes the Lockatong formation in PA. 

So it's possible, but the preservation looks (to me) more like either Connecticut or New Jersey. 

Wouldn’t be PA, lockatong, new Oxford, Gettysburg, hammer creek are the Newark super group formations and most are red (a few grey members but mostly red), none have I heard of such well preserved fish. Every now and then I have heard of complete fish but most of those probably end up in museums. 

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Fossildude19

But the Gwynedd shales have yielded complete fish in the past.

I'm just unfamiliar with the preservation from those black shales.

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WhodamanHD
4 minutes ago, Fossildude19 said:

But the Gwynedd shales have yielded complete fish in the past.

I'm just unfamiliar with the preservation from those black shales.

To be honest I’ve never heard of that formation, so I can’t say anything there.

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Fossildude19
Just now, WhodamanHD said:

To be honest I’ve never heard of that formation, so I can’t say anything there.

It is a member of the Lockatong formation - but that is from an older paper, and may have been changed in the 80-100 years since. :P 

But I agree - they are more likely to be from NJ or CT. :) 

 

 

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WhodamanHD
1 minute ago, Fossildude19 said:

may have been changed in the 80-100 years since. :P 

With the sluggish pace of research into the geology of this areas, wouldn’t be surprised if it hasn’t. Good to know, have to research it more, Thanks for telling me about it:1-SlapHands_zpsbb015b76:

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MarielleK

Now that you say it, it might have been Connecticut

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KimTexan

Beautiful specimens! 

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JohnBrewer
On 1/8/2018 at 8:33 PM, Fossildude19 said:

ventro-dorsally flattened. (On it's back, belly -up.) 

:dinothumb: for the definition Tim!

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Fossildude19
On 1/9/2018 at 3:10 PM, JohnBrewer said:

:dinothumb: for the definition Tim!

 

;)  I speak novice, fluently.  :D 

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ynot
3 hours ago, Fossildude19 said:

 

;)  I speak novice, fluently.  :D 

:hearty-laugh:

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JohnBrewer
On 10/01/2018 at 10:14 PM, Fossildude19 said:

 

;)  I speak novice, fluently.  :D 

:ighappy: and I understand a little novice :P

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