The Viche Formation is a Langhian (Friasian to Colloncuran in the SALMA classification) geologic formation of the Borbón Basin in northwestern Ecuador. The formation underlies the Angostura Formation. Fossils of Ziphiidae indet. have been found in the formation.Las Penas at Fossilworks.org
See also List of fossiliferous stratigraphic units in Ecuador
References
Further reading G. Bianucci, W. Landini, G. Valleri, L. Ragaini, and A. Varola. 2005. First cetacean fossil records from Ecuador, collected from the Miocene of Esmeraldas Province. Rivista Italiana di Paleontologia e Stratigrafia 111(2):345-350