The San Cayetano Formation is a geologic formation in western Cuba. It preserves fossils of mainly ammonites dating back to the Jurassic period.

• List of fossiliferous stratigraphic units in Cuba

• Bermúdez, Pedro J (1961), "Las formaciones geológicas de Cuba" (PDF), Geología Cubana, 1: 1–180, retrieved 2019-02-06
• H. Pugaczewska. 1978. Jurassic pelecypods from Cuba. Acta Palaeontologica Polonica 23(2):163-186