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What kind of fossil is this? Is this even a fossil?


ShanniElle

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My boyfriend works in northern Ontario (Canada) at a limestone rock quarry and found this while chipping a piece of rock. I am not sure if this is even a legitimite fossil and if so what kind it is and would love some feedback!

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I agree with ynot.  Looks like an orthoconic nautiloid.  Maybe something like Gomphoceras or Tetrameroceras?

 

VERY nice find!  And welcome to the forum!

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Hi @ShanniElle!

 

Welcome to the forum!

 

I initially thought that your piece might be an orthoconic (straight-shelled) nautiloid - a type of extinct cephalopod - but after looking at your pictures more closely I'm not so sure...  I've found quite a few orthoconic nautiloids down here in the Toronto area, and from what I've noticed, the segments extend from top to bottom on each piece.  Your piece doesn't seem to have segmentation right to the "top".  The segments in your piece also seem to have different widths - that could just mean that your piece is a bit smushed, but I don't know...  I'm thinking it's something else, likely geologic like Rockwood has said...

 

Keep looking!!!

 

Monica

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Orthocone cephalopod would be my guess, ... although Dale makes a valid point, about banded chert.

 

post-2806-0-96430500-1375996410.jpg.04caa32b3ab8655eab2dd9737975e015.jpg

 

I'd like to see a few pictures of the other side of the item. 

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I'm happy that that's a Gomphoceras-type nautiloid, as Peat Burns suggested. The last one or two chambers before the living chamber often seem to be narrower, as happens in ammonites too on maturity. 

Tarquin

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Here are two Gomphoceras species from this site, for comparison:

 

image.jpeg.85c28a060e94b6dafce58f876ab0035d.thumb.jpg.4147ea6fcc2b7c5ccbdcb48fd697c665.jpg1399403_255693564581946_1002203401_o.thumb.jpg.17c6198755c3f77d0c46e6dbb9a916b6.jpg1421023_255693514581951_593483925_o.thumb.jpg.b4316ee7ec8c4100770f7cf4eee2c3a4.jpg

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i just see a generalized ascoceratid(I think),BTW

might just as well be Diestoceras ,for all I know

 

 

 

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miscellaneous Ascoceratids from Lindstom,1890

* setting new standards illustrationwise,IMHO

lindsascocerswimstolSs.jpg

 

 

 

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  • 2 weeks later...

They really are an unusual fossil aren't they, I found a Gomphoceras ellipticum from the Elton beds over Wenlock limestone. I'd like to try and prep it further but not really sure how.   

 

Gomphoceras ellipticum 1.jpg

Gomphoceras ellipticum 2.jpg

Gomphoceras ellipticum 3.jpg

Regards.....D&E&i

The only certainty with fossil hunting is the uncertainty.

https://lnk.bio/Darren.Withers

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