Lagunitas [Talara Fm] - Nautiloidea: Bartonian, Peru
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Nautilida
- Hercoglossidae
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| 2 specimens | ||||||||||
| PRI 3701; SUI 1077 (2 measurements) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Peru |
| Coordinates: | 4.7° South, 81.3° West (view map) |
| Paleocoordinates: | 4.6° South, 69.2° West (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | hand sample |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Bartonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Bartonian | ||
| Age range of interval: | 41.03 - 37.71 m.y. ago |
Stratigraphy
| Formation: | Talara | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Saman or Talara Formation. AGE: Regarded as lower Upper Eocene on the basis of faunal similarity. Foraminifera suggest an upper Eocene age. Olsson states that the Talara and Saman rocks can be referred to the Upper Eocene and in terms of the European section, to the Bartonian and Ludian.....respectively? In most places the Talara Formation can be divided into three members, a lower shale (Talara Shale), a middle sandstone (Talara Sandstone), and an upper shale (Pozo Shale). In a complete section the Talara Formation has an average thickness of about 2800 ft. STRATIGRAPHIC POSITION: From unknown position in section. | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Unknown, but siliciclastic. LITHIFICATION: Lithified based on figured specimen. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Not stated, but probably siliciclastic shallow shelf setting. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | poor |
| Fragmentation: | occasional |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | PRI |
| Collection method comments: COLLECTOR: Unknown. REPOSITORY: PRI, Ithaca. | |
| Taxonomic list comments:COVERAGE: Limited to Nautiloidea described in primary publication. NOMENCLATURE: Authoritative publication with modern nomenclature and species-resolution identifications. | |
Metadata
| Database number: | 81874 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Subset of collection #: | 35081 | ||
| Created: | 2008-07-17 13:13:56 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2008-07-17 13:13:56 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 27587. | A. K. Miller. 1947. Tertiary nautiloids of the Americas. Geological Society of America Memoir 23:1-234 [A. Hendy/A. Hendy] |