The Sabana Grande Formation is a geologic formation in western Puerto Rico. The conglomerates and limestones of the formation preserve gastropod fossils of Trochactaeon woodsi dating back to the Late Campanian period.Sabana Grande Formation at Fossilworks.org
See also List of fossiliferous stratigraphic units in Puerto Rico
References
Further reading N. F. Sohl and H. A. Kollmann. 1985. Cretaceous Actaeonellid Gastropods from the Western Hemisphere. United States Geological Survey Professional Paper 1304:1-104