The Mayoan () age is a period of geologic time from 11.8 to 10 Ma, within the Middle to Late Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Laventan and precedes the Chasicoan age.Paleo Database: Mayoan
Etymology The age is named after the Río Mayo Formation in the Golfo San Jorge Basin of Patagonia, Argentina.
Formations
Formation Country Basin Notes Río Mayo Formation Golfo San Jorge Basin Coquimbo Formation Tongoy Bay Gran Bajo del Gualicho Formation Colorado Basin Huaylas Formation Parinacota Province Mauri Formation Altiplano Basin Navidad Formation Chilean Coast Range Paraná Formation Paraná Basin Pebas Formation Amazon Basin Pisco Formation Pisco Basin Puerto Madryn Formation Valdés Basin Urumaco Formation Falcón Basin Yecua Formation Paraná Basin
Fossil content Group Fossils Formation Notes Mammals Megathericulus patagonicus Río Mayo Caraguatypotherium munozi, Epipeltephilus caraguensis Huaylas Brujadelphis ankylorostris Pisco Cardiatherium patagonicum, Kawas benegasorum, Notoziphius bruneti, Scirrotherium carinatum, Lagostomus (Lagostomopsis) sp., Dolichotinae indet., Macraucheniidae indet., Mylodontinae indet., Neuryurini indet., Palaehoplophorini indet. PuertoMadryn cf. Theosodon sp. Yecua Birds Kuntur cardenasi, Ramphastosula aguirrei, Sula brandi, S. figueroae Pisco Madrynornis mirandus, Palaeospheniscus bergi, Accipitridae indet., Dendrocygninae indet., Psilopteridae indet. PuertoMadryn Reptiles Mourasuchus sp., Pleurodira indet. Yecua Fishes Cosmopolitodus hastalis Coquimbo Loricariidae indet., Percomorpha indet., Siluriformes indet. PuertoMadryn cf. Ariidae indet., Teleostei indet. Yecua
References
Bibliography Río Mayo Formation
Coquimbo Formation
Gran Bajo del Gualicho Formation
Huaylas Formation
Mauri Formation
Navidad Formation
Paraná Formation
Pebas Formation
Pisco Formation
Puerto Madryn Formation
Urumaco Formation
Yecua Formation