Río Foyel Fm - Estancia de Troncoso: Early/Lower Oligocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Spatangoida
- Schizasteridae
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Brisaster sp.
Gray 1855
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Gastropoda
- Turritellidae
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Turritella aff. ambulacrum
Sowerby 1846
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Gastropoda
- Naticidae
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Polinices sp.
Monfort 1810
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Fusinus patagoniensis n. sp.
Chiesa and Camacho 2001
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Bivalvia
- Nuculanida
- Malletiidae
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Neilo biradiata
Chiesa and Camacho 2001
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea nucleus
(Ihering 1899)
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Panopea zinsmeisteri n. sp.
Chiesa and Camacho 2001
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Bivalvia
- Cardiida
- Cardiidae
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Laevicardium sp.
Swainson 1840
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Loxocardium puelchum
(Sowerby 1846)
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| recombined as Trachycardium puelchum | |||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia (Venericor) sp.
Stewart 1930
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Bivalvia
- Mytilida
- Mytilidae
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Brachidontes sp.
Swainson 1840
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Bivalvia
- Pectinida
- Pectinidae
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Zygochlamys sp.
Ihering 1907
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Bivalvia
- Ostreida
- Pinnidae
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Pinna sp.
Linnaeus 1758
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris cf. ibari
(Philippi 1887)
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Rhynchonellata
- Terebratulida
- Terebratellidae
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Terebratella sp.
d'Orbigny 1847
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| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 41.7° South, 71.4° West (view map) |
| Paleocoordinates: | 43.6° South, 63.1° West |
| Basis of coordinate: | stated in text |
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Early/Lower Oligocene | ||
| Age range of interval: | 33.90000 - 27.82000 m.y. ago |
Stratigraphy
| Formation: | Rio Foyel | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Rio Foyel Fm. Unknown stratigraphic relations. THICKNESS: From lower 7 m of 18 m thick section. AGE: Considered to be Late Eocene to Early Oligocene according to foraminiferal, ostracod and microfloral biostratigraphy by Chiesa and Camacho (2001). Griffin et al. (2004) indicated an Early Oligocene age with Sr dates. STRATIGRAPHIC POSITION: From lower part of formation. | |||||
Lithology and environment
| Primary lithology: | lithified sandy,calcareous "shale" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Massive to finely bedded shale with calcareous sandstone beds. LITHIFICATION: Presumably lithified, based on age and facies (concretions and calcarenites | |
| Environment: | offshore |
| Geology comments: ENVIRONMENT: Offshore, siliciclastic setting. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Probably authors (J. Chiesa and H. Camacho). REPOSITORY: Unknown; some described material is reposited at CIRGEO (unknown location). | |
| Taxonomic list comments:COVERAGE; Exhaustive for brachiopods, bivalves, and gastropods. NOMENCLATURE: Authoritative publication, using fairly modern nomenclature and species-level assignments. | |
Metadata
| Database number: | 71600 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-30 18:07:02 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2007-04-30 18:07:01 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 24191. | J. O. Chiesa and H. H. Camacho. 2001. Invertebrados marino Eocenos de la parte de Río Negro, Argentina. Revista Española de Paleontología 16(2):299-316 [A. Hendy/A. Hendy] |