Hi all!
I found this limestone ammonite fossil in mount Carmel, Israel. Diameter is approximately 19cm. I removed the stone matrix from one of its sides and exposed a few remnants of something that looks like a coil running along the inner curves of the fossil (also mistakenly removed part of it when I just begun revealing it).
I added 2 pictures that present the fossil and the detail I don't recognize.
Can anyone help me identify this coil-like artifact?
Thank you! :-)