Fossils in Gym shower tiles

ILRockHound

Hatchling
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Jun 4, 2011
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The LifeTime Fitness Gym in my area has great fossils in the limestone tiles they use in the shower area - see pix. I believe they are from the "ammonitico rosso" layer found in Italy
http://onlinelibrary.wiley.com/doi/10.1002/9781444304855.ch11/summary
Ammonites and Belemnites.
Comments?

IMG_0868.JPG
IMG_0870.JPG
IMG_0876.JPG
IMG_0914.JPG
 
The siphuncle on (almost) all ammonoids is along the ventral margin, so what looks like a siphuncle in the middle of a whorl is more likely the siphuncle of an inner whorl. So, unless that line(s) through the center of the fossil is an artifact of another whorl, it is indeed the siphuncle. There may be a portion of the siphuncle on the right, but it is too broken up to tell for sure.
 

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