Thanks for the info. I wouldn’t know any of that since I’m a trained geologist.
#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.
I’m an untrained amateur genealogist, but I can assure people that “marble” gravestones are not real common because they literally MELT. They seem to dissolve from the elements. The ones pictured in the cemetery don’t appear to be marble. Hard to say as lighting, camera settings, etc. affect how a photo “appears”.
They appear to be in too good condition to be that old.