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Renova - Dunbar Creek, Jefferson County, Montana, USA

Formation	Renova
Member	Dunbar Creek
Age:	33.9 - 33.3 Ma Oligocene
Interval	Chadronian
Number of Collections	3
Number of Occurrences	37

Recorded Sample Locations

Location	Region	Stratigraphic Name
Shoddy Springs	Jefferson County, Montana, USA	Renova - Dunbar Creek

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Climbing Arrow	40.4 - 37.2 Ma Eocene		13
Climbing Arrow - upper	37.2 - 33.9 Ma Paleogene		2
Renova	24.8 - 16.0 Ma Cenozoic	sandstone	149
Renova - Climbing Arrow	37.2 - 33.9 Ma Paleogene	claystone	172
Sixmile Creek	16.0 - 5.33 Ma Miocene	siltstone	44

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Agriochoeridae family	5	Animalia : Chordata : Mammalia : Artiodactyla : Agriochoeridae	33.9 - 33.3 Ma Oligocene
Leptomeryx sp. genus	6	Animalia : Chordata : Mammalia : Artiodactyla : Leptomerycidae : *Leptomeryx*	37.2 - 33.9 Ma Paleogene
Leptomeryx evansi species	7	Animalia : Chordata : Mammalia : Artiodactyla : Leptomerycidae : Leptomeryx : *Leptomeryx evansi*	33.9 - 33.3 Ma Oligocene
Pronodens transmontanus species	7	Animalia : Chordata : Mammalia : Artiodactyla : Leptomerycidae : Pronodens : *Pronodens transmontanus*	33.9 - 33.3 Ma Oligocene
Merycoidodon (Merycoidodon) culbertsoni species	7	Animalia : Chordata : Mammalia : Artiodactyla : Merycoidodontidae : Merycoidodon : *Merycoidodon (Merycoidodon) culbertsoni*	37.2 - 33.9 Ma Paleogene
Merycoidodontidae family	5	Animalia : Chordata : Mammalia : Artiodactyla : Merycoidodontidae	33.9 - 33.3 Ma Oligocene
Hesperocyon sp. genus	6	Animalia : Chordata : Mammalia : Carnivora : Canidae : *Hesperocyon*	37.2 - 33.9 Ma Paleogene
Megalagus brachyodon species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Megalagus : *Megalagus brachyodon*	37.2 - 33.9 Ma Paleogene
Palaeolagus burkei species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Palaeolagus : *Palaeolagus burkei*	33.9 - 33.3 Ma Oligocene
Palaeolagus haydeni species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Palaeolagus : *Palaeolagus haydeni*	37.2 - 33.9 Ma Paleogene
Palaeolagus intermedius species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Palaeolagus : *Palaeolagus intermedius*	33.9 - 33.3 Ma Oligocene
Palaeolagus temnodon species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Palaeolagus : *Palaeolagus temnodon*	37.2 - 33.9 Ma Paleogene
Centetodon kuenzii species	7	Animalia : Chordata : Mammalia : Geolabididae : Centetodon : *Centetodon kuenzii*	33.9 - 33.3 Ma Oligocene
Copedelphys titanelix species	7	Animalia : Chordata : Mammalia : Marsupialia : Herpetotheriidae : Copedelphys : *Copedelphys titanelix*	33.9 - 33.3 Ma Oligocene
Didelphys valens species	7	Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Herpetotherium : *Didelphys valens*	37.2 - 33.9 Ma Paleogene
Peratherium fugax species	7	Animalia : Chordata : Mammalia : Marsupialia : Herpetotheriidae : Herpetotherium : *Peratherium fugax*	33.9 - 33.3 Ma Oligocene
Apternodus mediaevus species	7	Animalia : Chordata : Mammalia : Apternodontidae : Apternodus : *Apternodus mediaevus*	37.2 - 33.9 Ma Paleogene
Brontotheriidae family	5	Animalia : Chordata : Mammalia : Perissodactyla : Brontotheriidae	37.2 - 33.9 Ma Paleogene
Mesohippus bairdi species	7	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Mesohippus : *Mesohippus bairdi*	33.9 - 33.3 Ma Oligocene
Miohippus obliquidens species	7	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Miohippus : *Miohippus obliquidens*	37.2 - 33.9 Ma Paleogene
Hyracodon sp. genus	6	Animalia : Chordata : Mammalia : Perissodactyla : Hyracodontidae : *Hyracodon*	37.2 - 33.9 Ma Paleogene
Trigonias sp. genus	6	Animalia : Chordata : Mammalia : Perissodactyla : Rhinocerotidae : *Trigonias*	33.9 - 33.3 Ma Oligocene
Trigonias osborni species	7	Animalia : Chordata : Mammalia : Perissodactyla : Rhinocerotidae : Trigonias : *Trigonias osborni*	37.2 - 33.9 Ma Paleogene
Altasciurus relictus species	7	Animalia : Chordata : Mammalia : Rodentia : Aplodontidae : Altasciurus : *Altasciurus relictus*	33.9 - 33.3 Ma Oligocene
Eumys elegans species	7	Animalia : Chordata : Mammalia : Rodentia : Cricetidae : Eumys : *Eumys elegans*	33.9 - 33.3 Ma Oligocene
Paradjidaumo trilophus species	7	Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Paradjidaumo : *Paradjidaumo trilophus*	37.2 - 33.9 Ma Paleogene
Ischyromys sp. genus	6	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Ischyromys*	37.2 - 33.9 Ma Paleogene
Ischyromys veterior species	7	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : Ischyromys : *Ischyromys veterior*	37.2 - 33.9 Ma Paleogene

References

Kuenzi W. D., Fields R. W. (1971) Tertiary Stratigraphy, Structure, and Geologic History, Jefferson Basin, Montana, Geological Society America Bulletin 82 12, 3373-3394 doi:10.1130/0016-7606

Garcia D. (1990) Personal communication regarding Tertiary faunal lists, Jefferson County, Montana

Tabrum A. R., Prothero D. R., et al (1996) Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana, The Terrestrial Eocene-Oligocene Transition in North America, 278-311

Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals

Korth W. W., Diamond M. E. (2002) Review of Leptomeryx (Artiodactyla, Leptomerycidae) from the Orellan (Oligocene) of Nebraska, Annals of Carnegie Museum 71 2, 107-129

Prothero D. R. (2005) The Evolution of North American Rhinoceroses, 1-218

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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