Hello,
Please see the attached photos, I found this along the Withlacoochee River in Madison County, FL. Up the river from the limestone is Madison Blue Spring State Park located approximately ten miles east of Madison, FL. The limestone is from the Oligocene age Suwanee Limestone and I am interested in learning more about the spiral shaped gastropod in the center of the photo. There are other interesting shells in this specimen as well. Please see attached photos for reference. Thank you in advance!
Greg Kruse
Casper, WY