Earth:Pysht Formation
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| Pysht Formation Stratigraphic range: Late Oligocene, Chattian | |
|---|---|
 Fossil Callianopsis from the Pysht Formation | |
| Type | Geological formation |
| Unit of | Twin River Group |
| Underlies | Clallam Formation |
| Overlies | Makah Formation |
| Lithology | |
| Primary | Siltstone, mudstone, conglomerate |
| Location | |
| Coordinates | [ ⚑ ] : 48°12′N 123°54′W / 48.2°N 123.9°W |
| Paleocoordinates | [ ⚑ ] 47°48′N 114°54′W / 47.8°N 114.9°W |
| Region | Washington |
| Country | United States |
| Type section | |
| Named for | Pysht River |
The Pysht Formation is a geologic formation in Washington (state). It preserves fossils dating back to the Paleogene period, which appear to have been deposited in an offshore marine environment. Outcrops are present on the northern Olympic Peninsula, in Clallam County.[1]
Fossil content
Based on the Paleobiology Database:[2]
Cartilaginous fish
| Cartilaginous fish of the Pysht Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Somniosus | S. gonzalezi | A sleeper shark. | frameless | ||
Mammals
| Mammals of the Pysht Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| cf. Allodesmus | A. sp. | A desmatophocid pinniped. | frameless | ||
| Behemotops | B. proteus | The most basal known desmostylian. Type locality for genus and species. | frameless | ||
| Borealodon | B. oseax | A stem-baleen whale. Type locality for genus and species.[3] | |||
| Fucaia | F. goedertorum | An aetiocetid baleen whale. | |||
| ?Kronokotherium | K. sp. | A desmostylian. | |||
| Olympicetus | O. avitus | Two partial skulls belonging to a juvenile and a neonate, including part of the dentition and a tympanic bulla | A simocetid toothed whale. Type locality for genus and species.[4][5] | frameless | |
| O. thalassodon | Posterior part of skull | ||||
| Pinnarctidion | P. iverseni | A nearly complete skull and limited postcrania (SDSNH 146624).[6] | A pan-pinniped. | ||
| Sitsqwayk | S. cornishorum | Partial skull, tympanic bullae, mandibles and postcrania.[7] | An basal baleen whale. Type locality for genus and species.[7] | ||
Birds
| Birds of the Pysht Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Klallamornis | K. buchanani | A plotopterid suliform.[8] | frameless | ||
| Tonsala | T. hildegardae | A plotopterid suliform.[9] | frameless | ||
Crustaceans
| Crustaceans of the Pysht Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Upogebia | U. barti | Locality RB 18.[10] | Multiple specimens.[10] | An upogebiid mud shrimp. | |
See also
- List of fossiliferous stratigraphic units in Washington (state)
- Paleontology in Washington (state)
References
- ↑ "Geolex — Pysht publications". https://ngmdb.usgs.gov/Geolex/UnitRefs/PyshtRefs_11654.html.
- ↑ Czaplewski, John J.. "PBDB Navigator" (in en). https://paleobiodb.org/navigator/.
- ↑ Shipps, B. K.; Peredo, Carlos Mauricio; Pyenson, Nicholas D. (2019). "Borealodon osedax, a new stem mysticete (Mammalia, Cetacea) from the Oligocene of Washington State and its implications for fossil whale-fall communities" (in en). Royal Society Open Science 6 (7). doi:10.1098/rsos.182168. ISSN 2054-5703. PMID 31417706.
- ↑ Velez-Juarbe, J. (2017). "A new stem odontocete from the late Oligocene Pysht Formation in Washington State, U.S.A.". Journal of Vertebrate Paleontology 37 (5). doi:10.1080/02724634.2017.1366916. Bibcode: 2017JVPal..37E6916V.
- ↑ Velez-Juarbe, J. (2023). "New heterodont odontocetes from the Oligocene Pysht Formation in Washington State, U.S.A., and a reevaluation of Simocetidae (Cetacea, Odontoceti)". PeerJ 11. doi:10.7717/peerj.15576. PMID 37377790.
- ↑ Everett, Christopher J.; Deméré, Thomas A.; Wyss, André R. (2023-03-23). "A new species of Pinnarctidion from the Pysht Formation of Washington State (U.S.A.) and a phylogenetic analysis of basal pan-pinnipeds (Eutheria, Carnivora)". Journal of Vertebrate Paleontology 42 (3). doi:10.1080/02724634.2023.2178930. ISSN 0272-4634.
- ↑ 7.0 7.1 Peredo, Carlos Mauricio; Uhen, Mark D. (2016-11-01). "A new basal chaeomysticete (Mammalia: Cetacea) from the Late Oligocene Pysht Formation of Washington, USA" (in en). Papers in Palaeontology 2 (4): 533–554. doi:10.1002/spp2.1051. ISSN 2056-2802.
- ↑ Mayr, G.; Goedert, J. L. (2016). "Eocene and Oligocene remains of the flightless, penguin-like plotopterids (Aves, Plotopteridae) from Western Washington State". Journal of Vertebrate Paleontology 36 (4): 1–18. doi:10.1080/02724634.2016.1163573. Bibcode: 2016JVPal..36E3573M.
- ↑ Olson, S. L. (1980). "A new genus of penguin-like pelecaniform bird from the Oligocene of Washington (Pelecaniformes: Plotopteridae)". Contributions in Science 330: 51–57. doi:10.5962/p.208144.
- ↑ 10.0 10.1 Fraaije, R. (January 2006). "Two new Paleogene species of mud shrimp (Crustacea, Decapoda, Upogebiidae) from Europe and North America". Bulletin of the Mizunami Fossil Museum (33): 81–89. https://www.researchgate.net/publication/268333982.
- ((Various Contributors to the Paleobiology Database)). "Fossilworks: Gateway to the Paleobiology Database". https://www.fossilworks.org.
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