The Jarao Formation is a geologic formation in Cuba. The dark-colored limestone intercalated with volcanic and tuffaceous formation preserves rudist fossils of Vaccinites inaequicostatus and dates back to the Santonian period.Jarao Formation at Fossilworks.org
See also List of fossiliferous stratigraphic units in Cuba
References
Further reading
R. Rojas, M. Iturralde Vinent, and P. W. Skelton. 1995. Stratigraphy, composition and age of Cuban rudist-bearing deposits. Revista Mexicana de Ciencias Geológicas 12(2):272-291