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The Montehermosan age is a period of geologic time (6.8–4.0 Ma) within the Miocene and Pliocene epochs of the Neogene used more specifically with South American Land Mammal Ages. It follows the Huayquerian and precedes the Chapadmalalan age.

References

1. Paleo Database: Montehermosan

v t e South American land mammal ages
Ages	Lujanian Ensenadan Uquian Chapadmalalan Montehermosan Huayquerian Chasicoan Mayoan Laventan Colloncuran Friasian Santacrucian Colhuehuapian Deseadan Tinguirirican Divisaderan Mustersan Casamayoran Itaboraian Riochican Peligran Tiupampan
Defining formations and sites	Quaternary Luján Formation Ensenada Formation Uquía Formation Neogene Chapadmalal Formation Monte Hermoso Formation Huayquerías Formation Arroyo Chasicó Formation Río Mayo Formation Honda Group La Venta fauna Collón Curá Formation Río Frías Formation Santa Cruz Formation Colhué Huapí Member Paleogene Deseado Formation Abanico Formation Tinguiririca fauna Divisadero Largo Formation Sarmiento Formation Lake Musters Casamayor Formation Itaboraí Formation Río Chico Group Salamanca Formation Punta Peligro Santa Lucía Formation Tiupampa fauna
Sources	Bibliography
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