👉 "Postcretaceous" is a term that refers to a type of fossil, specifically a Late Triassic (240-195 million years ago) ammonoid, which lived during the Cretaceous period. Postcretaceous fossils are characterized by their presence in layers within sedimentary rock and have a distinctive, rounded shape and smooth surfaces. The term "postcretaceous" was coined to describe these types of fossils because they were found in layers that were typically deposited during the C
