Alsea Formation
Alsea Formation Stratigraphic range: Rupelian (Whitneyan) ~ | |
---|---|
Type | Formation |
Underlies | Yaquina Formation |
Lithology | |
Primary | Siltstone |
Other | Mudstone |
Location | |
Coordinates | 44°36′N 124°00′W / 44.6°N 124.0°WCoordinates: 44°36′N 124°00′W / 44.6°N 124.0°W |
Approximate paleocoordinates | 44°18′N 113°06′W / 44.3°N 113.1°W |
Region | Lincoln County, Oregon |
Country | United States |
Alsea Formation (the United States) Alsea Formation (Oregon) |
The Alsea Formation is a geologic formation in Oregon. It preserves fossils dating back to the Rupelian stage of the Oligocene period.[1]
Fossil content[]
The following fossils have been reported from the formation:[1]
Mammals[]
Fish[]
See also[]
References[]
- ^ a b Alsea Formation at Fossilworks.org
- ^ Deméré & Berta, 2008
- ^ Peredo et al., 2018
- ^ Fordyce, 2002
- ^ Welton, 2016
Bibliography[]
- Current Biology 28. 1-9. ; ; , and . 2018. Tooth loss precedes the origin of baleen in whales.
- Fossil Record 5. 303–308. . 2016. First report of Orthechinorhinus (Squaliformes: Etmopteriidae) from the Pacific Basin; A new species from Early Oligocene rocks of Oregon, USA.
- Zoological Journal of the Linnean Society 154. 308–352. , and . 2008. Skull anatomy of the Oligocene toothed mysticete Aetiocetus weltoni (Mammalia; Cetacea): implications for mysticete evolution and functional anatomy.
- Smithsonian Contributions to Paleobiology 93. 185–222. . 2002. Simocetus rayi (Odontoceti, Simocetidae, new family); a bizarre new archaic Oligocene dolphin from the eastern North Pacific.
Categories:
- Paleogene geology of Oregon
- Oligocene Series of North America
- Rupelian Stage
- Whitneyan
- Siltstone formations
- Mudstone formations
- Shallow marine deposits
- Paleontology in Oregon
- Landforms of Lincoln County, Oregon