USGS Cenozoic M4654 East Twin Creek: Middle Eocene, California
collected by Nilsen, T. H. 1971
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Cardiida
- Cardiidae
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Nemocardium linteum
(Conrad 1855)
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| recombined as Nemocardium (Nemocardium) linteum | ||||||||||
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Bivalvia
- Cardiida
- Veneridae
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? Pitar sp.
Römer 1857
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Pitar joaquinensis
Vokes 1939
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Bivalvia
- Solenida
- Solenidae
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? Solen sp.
Linnaeus 1758
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Bivalvia
- Carditida
- Carditidae
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? Venericardia sp.
Lamarck 1801
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| minute specimen | ||||||||||
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Gastropoda
- Ampullinidae
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Pachycrommium clarki
(Stewart 1927)
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Eocernina sp.
Gardner 1934
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| spelled with current rank as Cernina (Eocernina) | ||||||||||
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Gastropoda
- Naticidae
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Neverita globosa
Gabb 1869
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| recombined as Neverita (Neverita) globosa | ||||||||||
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? Amaurellina sp.
Fischer 1885
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Gastropoda
- Strombidae
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Ectinochilus macilentus
(White 1889)
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Gastropoda
- Neogastropoda
- Volutidae
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Lyria andersoni
Waring 1917
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Gastropoda
- Ficidae
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Ficopsis cf. meganosensis
Clark and Woodford 1927
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| packardi | ||||||||||
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Gastropoda
- Turritellidae
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Turritella merriami
Dickerson 1913
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Kern |
| Coordinates: | 34.9° North, 119.3° West (view map) | ||||
| Paleocoordinates: | 35.2° North, 106.1° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Middle Eocene | ||
| Age range of interval: | 47.80000 - 37.71000 m.y. ago |
Stratigraphy
| Formation: | San Emigdio | Member: | Uvas Conglomerate | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Early Eocene, "Capay Stage." The distinctive species Turritella merriami is restricted in stratigraphic occurrence to assemblages correlated with the "Capay." Most of the gastropods range from the "Capay" to the "Domengine Stage." The occurrence of Pitar joaquinensis in this assemblage seems to be a range extension; previous records are from faunas correlated with the "Domengine Stage." | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | biostratigraphic analysis | ||
| Collectors: | Nilsen, T. H. | Collection dates: | 1971 |
Metadata
| Also known as: | UCMP IP8673 | ||
| Database number: | 194431 | ||
| Authorizer: | P. Holroyd | Enterer: | S. Tremblay |
| Modifier: | S. Tremblay | Research group: | marine invertebrate |
| Created: | 2018-06-19 18:50:16 | Last modified: | 2018-06-22 19:29:04 |
| Access level: | the public | Released: | 2018-06-19 18:50:16 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 14208. | T. H. Nilsen. 1987. Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California. United States Geological Survey Professional Paper 1268:1-110 [A. Miller/A. Hendy/R. McClees-Funinan] |