Vaca Mahuida Fm - Vaca Mahuida: Late/Upper Eocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Clypeasteroida
- Monophorasteridae
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Iheringiana patagonensis
(Desor 1847)
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| recombined as Iheringiella patagonensis | |||||||
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Gastropoda
- Turritellidae
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Turritella rustica
Uliana and Camacho 1975
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Bivalvia
- Carditida
- Carditidae
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Venericardia (Venericor) sp.
Stewart 1930
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Bivalvia
- Unionida
- Hyriidae
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Diplodon glaucus
Uliana and Camacho 1975
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| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 40.0° South, 67.0° West (view map) |
| Paleocoordinates: | 42.1° South, 58.2° West |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | local area |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Late/Upper Eocene | ||
| Age range of interval: | 37.71000 - 33.90000 m.y. ago |
Stratigraphy
| Formation: | Vaca Mahuida | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Vaca Mahuida Fm, which overlies the Roca Fm (Danian), and unconformably overlies the Barranca de los Lorors Fm (Late Miocene - terrestrial). THICKNESS: 44 m thick at type section. AGE: Late Eocene based on paleontological evidence, though not justified. STRATIGRAPHIC POSITION: Unknown position within formation. | |||||
Lithology and environment
| Primary lithology: | unlithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Difficult to assign to any single lithology. Text lists the following lithologies: alternate and subhorizontal claystones and limolites, tuffs, and tuffed sandstones, bioclastic limestones, psammites, psephites, and evaporites. LITHIFICATION: Assumed to be unlithified, based on figured specimens of Del Rio (2004). | |
| Environment: | marine indet. |
| Glacial or sequence phase: | regressive |
| Geology comments: ENVIRONMENT: Ranging from marine to freshwater. No evidence of estuarine environments based on taxonomic compositon. | |
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: COLLECTOR: Presumed to be collected by M.A. Uliana and H.H. Camacho. REPOSITORY: Catedra de Paleonologia de la Facultad de Ciencias Exactas y Naturales de Buenos Aires (UBA). | |
| Taxonomic list comments:IDENTIFIER: H.H. Camacho (Facultad de Ciencias Exactas y Naturales de Buenos Aires). COVERAGE: Probably not exhaustive, but representative of common gastropoda and bivalvia. NOMENCLATURE: Slightly antiquated nomenclature, but from authoritative publication and with species-level designations. | |
Metadata
| Database number: | 66142 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-10-01 19:10:51 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2006-10-01 19:10:50 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 18942. | M. A. Uliana and H. H. Camacho. 1975. Estratigrafia y paleontologia de la formacion Vaca Mahuida. Actas 1° Congreso Argentino de Paleontología y Bioestratigrafía, Tucumán 2:357-373 [A. Hendy/A. Hendy/A. Hendy] |