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Is this a cast of the internal structure of this brachiopod?Kaibab limestone


dugol

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Welcome to the Forum. 

Can we see a picture of the other side, top, and bottom? 
Also, something in the pics for scale. 

 

Enlarged your photo a bit.

 

Capture.PNG.32d98da1daeaf3c4b3f3a63e5540d8bc.PNG

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You are looking at the inside of a productid brachiopod possibly Peniculauris bassi  which is very common in the Kaibab. I can't find  a photo of the internal parts.

 

See plate 45 figures 1 and 2 in The Environment and History of Toroweap and Kaibab Formations of Northern Arizona and Southern Utah Volume 492 of Carnegie institution of Washington.       https://babel.hathitrust.org/cgi/pt?id=mdp.39015009184303;view=1up;seq=333

image.jpg

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