Skooner Gulch I: Aquitanian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Chlamys aff. mollita
Reeve 1853
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Addicott 1967 | |||||||||
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Gastropoda
- Turritellidae
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Turritella inezana
Conrad 1857
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Addicott 1967 | |||||||||
| forma hoffmanni | ||||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chlamys cf. hertleini
(Loel and Corey 1932)
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Addicott 1967 | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma sp.
Dall 1901
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Addicott 1967 | |||||||||
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Mammalia
- Perissodactyla
- Paleoparadoxiidae
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Paleoparadoxia weltoni n. sp.
Clark 1991
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1 specimen | |||||||||
| recombined as Archaeoparadoxia weltoni | ||||||||||
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Mammalia
- Perissodactyla
- Desmostylidae
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Desmostylus sp.
Marsh 1888
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Addicott 1967 | 1 specimen | ||||||||
| USNM PAL 706595 | ||||||||||
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Desmostylus hesperus
Marsh 1888
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Domning 2008 | |||||||||
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Mammalia
- Carnivora
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Enaliarctos mealsi
Mitchell and Tedford 1973
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Poust 2018 | 2 specimens | ||||||||
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Chondrichthyes
- Lamniformes
- Megachasmidae
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Megachasma applegatei
Shimada et al. 2014
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Shimada et al. 2014 | 1 specimen | ||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Mendocino |
| Coordinates: | 38.9° North, 123.7° West (view map) | ||||
| Paleocoordinates: | 34.5° North, 112.8° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Aquitanian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Aquitanian | ||
| Age range of interval: | 23.03000 - 20.44000 m.y. ago |
Stratigraphy
| Formation: | Skooner Gulch | ||||
| Stratigraphy comments: Miocene part of the Arikareean NALMA, possibly latest Oligocene |
Lithology and environment
| Primary lithology: | coarse sandstone |
| Lithology description: massive, coarse to fine grained sandstone | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body,original phosphate |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | UCMP V75135, USGS M-1114 | ||
| Database number: | 58899 | ||
| Authorizer: | M. Uhen, P. Holroyd | Enterer: | M. Uhen, P. Holroyd |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2006-02-28 12:28:02 | Last modified: | 2023-06-26 15:22:36 |
| Access level: | the public | Released: | 2006-02-28 12:28:02 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 16702. | J. M. Clark. 1991. A new early Miocene species of Paleoparadoxia (Mammalia: Desmostylia) from California. Journal of Vertebrate Paleontology 11(4):490-508 [M. Uhen/M. Uhen/J. Alroy] |
Secondary references:
| 85109 | W. O. Addicott. 1967. Age of the Skooner Gulch Formation, Mendocino County, California. US Geological Survey Bulletin Contributions to Stratigraphy 1254(C):1-11 [M. Uhen/M. Uhen] | |
| 30424 | D. P. Domning. 2008. Desmostylia. In C. M. Janis, G. F. Gunnell, M. D. Uhen (eds.), Evolution of Tertiary Mammals of North America, Volume II 640-645 [M. Uhen/M. Uhen] | |
| 85108 | K. Matsui and N. D. Pyenson. 2023. New evidence for the antiquity of Desmostylus (Desmostylia) from the Skooner Gulch Formation of California. Royal Society Open Science 10(221648):1-10 [M. Uhen/M. Uhen] | |
| 64368 | A. W. Poust. 2018. Expanding the geographic and geochronologic range of early pinnipeds: New specimens of Enaliarctos from Northern California and Oregon. Acta Palaeontologica Polonica [M. Uhen/M. Uhen] | |
| 55383 | K. Shimada, B. J. Welton, and D. J. Long. 2014. A new fossil megamouth shark (Lamniformes, Megachasmidae) from the Oligocene-Miocene of the western United States. Journal of Vertebrate Paleontology 34(2):281-290 [P. Holroyd/P. Holroyd] |