Me on Day 12 of my employment as an assistant professor:

A ~460 million yr old (Mid Ordovician) orthoceratite in marine limestone from the Siljan District, central Sweden. The animal moved fluid between chambers in its shell (space between the crescent shaped lines) to change buoyancy/orientation. Second pic is an artist redition.

"Tell me the secrets of the Late Ordovician mass extinction," he whispered to the oncoid platform bed. But it said nothing, for it was a rock. #FossilFriday

Y'all, Dr. Emma Oti is a good friend and PhD graduate from The Ohio State University School of Earth Sciences. She makes people laugh and feel heard. Can't wait for this

Giving a GSA talk later this morning. Come on by :) gsa.confex.com/gsa/2020AM/mee…