| Runningwater Formation | |
|---|---|
| Stratigraphic range: Early Miocene (Hemingfordian) ~20.6–16.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
| Type | Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate |
| Location | |
| Coordinates | 42°24′N 103°00′W / 42.4°N 103.0°W / 42.4; -103.0 |
| Approximate paleocoordinates | 43°06′N 99°06′W / 43.1°N 99.1°W / 43.1; -99.1 |
| Region | Nebraska |
| Country |  United States |
  Runningwater Formation (the United States)Show map of the United States Runningwater Formation (Nebraska)Show map of Nebraska | |
The Runningwater Formation is a geologic formation in Nebraska. It preserves fossils dating back to the Hemingfordian of the Early Miocene of the Neogene period. The sandstones and conglomerates of the formation were deposited in a fluvial environment. The formation has provided many fossil mammals.
Fossil content
Among the following fossils have been found in the formation:
- Mammals
- Aletomeryx gracilis
- Arretotherium fricki
- Barbouromeryx trigonocorneus
- Cynarctoides acridens
- Cynelos stenos
- Diceratherium niobrarense
- Daphoenodon (Borocyon) robustum
- Desmocyon thomsoni
- Hypertragulus minor
- Menoceras barbouri
- Merychyus arenarum, M. elegans
- Metatomarctus canavus
- Osbornodon iamonensis
- Pseudoblastomeryx advena
- Anchitheriomys stouti
- Desmatippus tyleri
- Edaphocyon lautus
- Amphicyon galushai
- Craterogale cf. simus
- Leptarctus cf. ancipidens
- Leptocyon vulpinus
- Tephrocyon scitulus
- Merycochoerus proprius
- Reptiles
See also
References
- Runningwater Formation at Fossilworks.org
- Hunt & Yatkola, 2020
Bibliography
- Hunt Jr, Robert M.; Yatkola, Daniel A. (2020), "A new species of the amphicyonid carnivore Cynelos Jourdan, 1862 from the early Miocene of North America", Geodiversitas, 42 (5): 57–67, doi:10.5252/geodiversitas2020v42a5
- Geologic formations of Nebraska
- Neogene geology of Nebraska
- Miocene Series of North America
- Hemingfordian
- Aquitanian (stage)
- Burdigalian
- Sandstone formations of the United States
- Conglomerate formations
- Fluvial deposits
- Fossiliferous stratigraphic units of North America
- Paleontology in Nebraska
- Box Butte County, Nebraska
- Dawes County, Nebraska