UW 2540 - Potrero Hills: Thanetian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Nuculida
- Nuculidae
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Acila (Truncacila) decisa
(Conrad 1855)
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Bivalvia
- Mytilida
- Mytilidae
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Volsella merriami
(Weaver 1905)
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recombined as Modiolus (Modiolus) merriami | ||||||||||
Bivalvia
- Pectinida
- Limidae
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Lima multiradiata
Gabb 1869
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recombined as Acesta (Acesta) multiradiata | ||||||||||
Bivalvia
- Arcida
- Glycymerididae
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Glycymeris veatchii
(Gabb 1864)
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Subspecies: Glycymeris veatchii major | ||||||||||
= Glycymerita major
Stanton 1896
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Hendy 2020 | |||||||||
Bivalvia
- Solenida
- Solenidae
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Solena stantoni
(Weaver 1905)
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recombined as Solena (Eosolen) stantoni | ||||||||||
Bivalvia
- Cardiida
- Cardiidae
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Nemocardium linteum
(Conrad 1855)
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recombined as Nemocardium (Nemocardium) linteum | ||||||||||
Bivalvia
- Cardiida
- Tellinidae
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"Tellina" undulifera
Gabb 1869
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recombined as Tellina (Saulella) undulifera | ||||||||||
Tellina martinezensis
Weaver 1905
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recombined as Tellina (Eurytellina) martinezensis | ||||||||||
Bivalvia
- Cardiida
- Veneridae
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Pitar quadratus
(Gabb 1864)
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Gastropoda
- Ficidae
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Priscofusus robustus
(Weaver 1905)
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recombined as Priscoficus robustus | ||||||||||
Gastropoda
- Neogastropoda
- Muricidae
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Perissolax tricarinatus
(Weaver 1905)
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recombined as Pseudoperissolax tricarnatus | ||||||||||
Gastropoda
- Naticidae
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Euspirocrommium martinezensis
(Dickerson 1914)
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original and current combination Amauropsis martinezensis | ||||||||||
Polinices hornii
(Gabb 1864)
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Gastropoda
- Turritellidae
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Turritella infragranulata
Gabb 1864
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Turritella pachecoensis
Stanton 1896
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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: | biostratigraphic 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: | 52618 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | M. Clapham | Research group: | marine invertebrate |
Created: | 2005-08-11 22:48:34 | Last modified: | 2017-04-23 09:10:10 |
Access level: | the public | Released: | 2005-08-11 22:48:34 |
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] |
Secondary references:
63217 | A. J. W. Hendy. 2020. Unpublished taxonomic backbone for Eastern Pacific Invertebrate Communities of the Cenozoic (EPICC) Thematic Collections Network. [A. Hendy/A. Hendy/A. Hendy] |