Here's something I found in alluvium this fall. The location is Dorchester County, SC, Oligocene, almost certainly Ashley or Chandler Bridge formation. These formations are known for a variety of marine vertebrates including Elasmos and bony fish including Scombrids and billfish, marine turtles, cetaceans, sirenians, and crocodiles. Fresh water species are apparently rare.   This is about 4.5 cm long, less than 1 cm diameter. It is not quite round in cross section, but has a slightly f