2.3" Jurassic Ammonite (Microderoceras) - Charmouth, England

This is a 2.3" wide, calcite replaced ammonite (Microderoceras birchi) fossil from Charmouth England. It has been nicely prepared using mechanical tools to remove the surrounding limestone. The rock has been cut flat so that it stands up nicely without the need for a display stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
Microderoceras birchi
Charmouth, Lyme Regis, Dorset, England
Lower Lias, Birchi Subzone, Turneri Zone
Ammonite: 2.3" wide, Rock: 5.35 x 3.3"
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