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The Goose Creek Limestone is early-mid Pliocene and contains un-reworked Miocene-Pliocene fossils. ID references: 1. Gale, B. (2020). A Beachcomber's Guide to Fossils. The University of Georgia Press. 2. Kocsis, L. (2007). Central paratethyan shark fauna (Ipolytarnóc, Hungary). GEOLOGICA CARPATHICA-BRATISLAVA-, 58(1), 27 3. Maisch IV, H., Becker, M., & Chamberlain Jr, J. (2015). Chondrichthyans from a lag deposit between the Shark River Formation (Middle Eocene) and Kirkwood Formation (Early Miocene), Monmouth County, New Jersey. Paludicola, 10, 149-183. Stratigraphy information references: 1. Boessenecker, R. (2008, May 13). The Ashley Phosphate Beds: the Reconstruction Era, Vertebrate Paleontology, Fossil Preservation, and Stratigraphic Confusion in Charleston, South Carolina. The Coastal Paleontologist. https://coastalpaleo.blogspot.com/2018/05/the-ashley-phosphate-beds.html. 2. Campbell, M. R., & Campbell, L. D. (1995). Preliminary biostratigraphy and molluscan fauna of the Goose Creek Limestone of eastern South Carolina. Tulane Studies in Geology and Paleontology, 27(1-4).

Isurus retroflexus is from the Miocene-Pliocene epochs. While the vast majority of what I find in this particular location is Miocene-Pliocene in age and is likely to have come from the Goose Creek Limestone formation (early-mid Pliocene), we can't rule out the possibility that it came from an overlying lag deposit called the Ten Mile Hill Formation. The Ten Mile Hill Formation is mid-Pleistocene and can be found overlying older formations in the area. Since Miocene-Pliocene fossils have been found in the base of the Ten Mile Hill Formation and this tooth was ex-situ, the formation is undetermined. ID references: 1. Gale, B. (2020). A Beachcomber's Guide to Fossils. The University of Georgia Press. 2. Kocsis, L. (2007). Central paratethyan shark fauna (Ipolytarnóc, Hungary). GEOLOGICA CARPATHICA-BRATISLAVA-, 58(1), 27 3. Maisch IV, H., Becker, M., & Chamberlain Jr, J. (2015). Chondrichthyans from a lag deposit between the Shark River Formation (Middle Eocene) and Kirkwood Formation (Early Miocene), Monmouth County, New Jersey. Paludicola, 10, 149-183. Stratigraphy information references: 1. Boessenecker, R. (2008, May 13). The Ashley Phosphate Beds: the Reconstruction Era, Vertebrate Paleontology, Fossil Preservation, and Stratigraphic Confusion in Charleston, South Carolina. The Coastal Paleontologist. https://coastalpaleo.blogspot.com/2018/05/the-ashley-phosphate-beds.html. 2. Campbell, M. R., & Campbell, L. D. (1995). Preliminary biostratigraphy and molluscan fauna of the Goose Creek Limestone of eastern South Carolina. Tulane Studies in Geology and Paleontology, 27(1-4). 3. Sanders, A. E., Weems, R. E., & Albright III, L. B. (2009). Formalization of the Middle Pleistocene ‘Ten Mile Hill Beds’ in South Carolina with evidence for placement of the Irvingtonian-Rancholabrean boundary. Papers on Geology, Vertebrate Paleontology, and Biostratigraphy in Honor of Michael O. Woodburne, 363-370.

Found between Plum Point and Parker’s Creek. It is an upper anterior. Isurus retroflexus may be conspecific with Isurus paucus. Not found in situ.