ammonite

July 17, 2014August 15, 2018 itssedimentary

Ammonite (Placenticeras intercalare) Bearpaw Formation, Lethbridge, Alberta, Canada 75 million years old American Museum of Natural History - NYC Image by author

paleobiology

Ammonite

June 26, 2014August 15, 2018 itssedimentary

The Jurassic (early Mesozoic) is known as the ‘Age of the Ammonites,’ as they were the original index fossils used by William Smith. Along with dinosaurs, corals, brachiopods, and molluscs, they were among the hardest hit species during the K-T extinction 65 Ma. Image by author