#12. I majored in Anthropology/Archaeology and “minered” in Geology ( I was lousy in my Stratigraphy class but worked as a lab assistant on Conodonts, those my teacher found in the Cincinatti Basal Formation (Grand Tetons, possibly) and my own finds in the Ordovician rocks of a limestone quarry just outside of Chambersburg, PA and along the nearby railroad tracks.
Whatever I wrote about limestone is based on things I learned about 50 years ago though I ocassionally took my kids and now my granddaughter out to fossil sites in the Shenandoah Valley and the Miocence of the Potomac River/Paleocene of the DC Beltway.
Rocks don’t change that much in 50 years. :-)