Orthoceras fossil section from the Cretaceous era, in limestone with the shell filled with calcite.

---

Size: 2912px × 4368px
Photo credit: © Art of Nature / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: calcite, cephalopod, cretaceous, cross-section, fossil, geology, limestone, mollusc, mollusk, orthoceras, pattern, polished, science, section, septa, septae