Large Ammonite Fossil

£ 100.00

A very large, unpolished and uncut Ammonite fossil, displaying the classic spiral shell, formed as the ammonite grows. This fossil is around 100 million years old, from the Cretaceous period. There are some earthly encrustations and chips on the shell’s exterior.

Date: Circa 100 million years old
Period: Cretaceous Period
Provenance: From the ex Heather Gerrard collection.
Condition: Good condition - there are some chips and earthly encrustations on the outside of the shell.


SKU: AF-29 Category: Tags: ,

Ammonites are part of the cephalopod family, along with Nautiloids and Coleoids (which include squid and octopuses). Although Ammonites look similar to Nautiloids, both species inhabit a coiled shell, they are actually believed to be more closely related to Coleoids. Ammonites were born with one tiny shell and built new chambers as they grew. They would have moved into the new chamber, sealing off the older, smaller chambers, these chambers were also filled with gas, allowing the ammonite to control its buoyancy.

Ammonites first appeared around 450 million years ago, during the Paleozoic Era, and became extinct around 66 million years ago, at the end of the Cretaceous period. Ammonites became extinct at the same time as the dinosaurs, in a mass extinction believed to have been caused by an asteroid collision.

Weight 4550 g
Dimensions L 22.5 x W 9.5 x H 22.5 cm
Time Period