UW 2363 - Potrero Hills: Thanetian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella pachecoensis
Stanton 1896
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Turritella infragranulata
Gabb 1864
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Gastropoda
- Naticidae
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Euspirocrommium martinezensis
(Dickerson 1914)
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| original and current combination Amauropsis martinezensis | ||||||||||
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Polinices hornii
(Gabb 1864)
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Gastropoda
- Ficidae
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Priscofusus robustus
(Weaver 1905)
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| recombined as Priscoficus robustus | ||||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia lineata
Stanton 1896
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Gastropoda
- Neogastropoda
- Muricidae
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Perissolax tricarnatus
Weaver 1905
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| recombined as Pseudoperissolax tricarnatus | ||||||||||
| misspelled as "Perissolax tricarinatus" | ||||||||||
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Bivalvia
- Cardiida
- Veneridae
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Pitar quadratus
(Gabb 1864)
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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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Anthozoa
- Scleractinia
- Flabellidae
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Flabellum remondianum
Gabb 1864
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| synonym of Flabellum cuneiforme | ||||||||||
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Anthozoa
- Scleractinia
- Guyniidae
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Trochocyathus zitteli
Vaughan 1900
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| recombined as Palaeopsammia zitteli | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Solano |
| Coordinates: | 38.2° North, 122.0° West (view map) | ||||
| Paleocoordinates: | 43.4° North, 101.0° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| Stage: | Thanetian | 10 m.y. bin: | Cenozoic 1 |
| Key time interval: | Thanetian | ||
| Age range of interval: | 59.20000 - 56.00000 m.y. ago |
Stratigraphy
| Formation: | Martinez | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Most of the fossiliferous faunas in the sections near Martinez occur in the lower 800 ft thick sandstone unit. Mollusca suggest a "Martinez" stage age. Martinez local stage = Thanetian. The Martinez Formation rests with a slight unconformity on the Chico Formation and grades in Eocene shales. The formation is approximately 3100 ft thick with a 1500 ft lower sandstone unit and 1600 ft upper sandy shale, which is dated as Early Eocene. | |||||
Lithology and environment
| Primary lithology: | medium,coarse,glauconitic poorly lithified sandstone |
| Includes fossils? | Y |
| Lithology description: Massive, medium- and coarse-grained sandstones, in part glauconitic. | |
| Environment: | offshore |
| Geology comments: No environmental information reported, but fauna appears to be offshore shelf. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: Collected and identified by C.E. Weaver. Collections reposited in University of Washington collections. | |
| Taxonomic list comments:Exhaustive for Mollusca, Foraminifera, and Coelenterata. Nomenclature is somewhat antiquated, but with a high proportion of species designations. | |
Metadata
| Database number: | 52611 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2005-08-11 22:33:00 | Last modified: | 2017-04-23 09:14:33 |
| Access level: | the public | Released: | 2005-08-11 22:33:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14145. | C. E. Weaver. 1949. Geology of the coast ranges immediately north of the San Francisco Bay region, California. Geological Society of America Memoir 35 [A. Miller/A. Hendy/A. Hendy] |