The San Cayetano Formation is a geologic formation in western Cuba. It preserves fossils of mainly ammonites dating back to the Jurassic period.San Cayetano Formation at Fossilworks.org
See also List of fossiliferous stratigraphic units in Cuba
References
Further reading
H. Pugaczewska. 1978. Jurassic pelecypods from Cuba. Acta Palaeontologica Polonica 23(2):163-186