The Urraca Formation is a geologic formation in Panama. The reefal limestone formation preserves coral fossils dating to the Early Pleistocene.Urraca Formation at Fossilworks.org
See also List of fossiliferous stratigraphic units in Panama
References
Further reading J. S. Klaus, D. F. McNeill, A. F. Budd and A. G. Coates. 2012. Neogene reef coral assemblages of the Bocas del Toro region, Panama: the rise of Acropora palmata. Coral Reefs 31(1):191-203