3.5" Fossil Heteromorph (Nostoceras) Ammonite - Madagascar

This is a really cool heteromorph ammonite (Nostoceras sp.) fossil from Madagascar. Unlike most ammonites that lived in tightly coiled, spiral shell that retains their shape throughout the cephalopod's life, heteromorph ammonites have irregularly-coiled or uncoiled shells. These hetermorph ammonites are Late Cretaceous in age (Campanian Stage) or approximately 70 million years old.

Almost all of the surrounding limestone has been painstakingly removed to provide the best picture of the entire ammonite. The rock was then polished to create a smooth surface. There are a couple repaired cracks through the ammonite.

The base of the rock has been cut flat for presentation.