“When you go to the quarries, golden ammonites peek out from black shale slabs,” said Rowan Martindale, an associate professor at the University of TexasJackson School of Geosciences and co-author of the 2023 study, in a release at the time.
Evidence for ammonite survival into the Paleogene era is solid, a new study confirms, indicating that these ancient mollusks were well positioned to inherit oceans now cleared of competitors.