western slopes of Cerro Pampa: Tortonian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Notoungulata
- Interatheriidae
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Protypotherium cf. antiquum
Ameghino 1882
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| MCH-P 257; right hemimandible | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Catamarca |
| Coordinates: | 27.4° South, 66.9° West (view map) | ||
| Paleocoordinates: | 27.6° South, 64.5° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Tortonian | ||
| Age range of interval: | 11.63000 - 7.24600 m.y. ago |
Stratigraphy
| Geological group: | Santa María | Formation: | Chiquimil | Member: | El Áspero |
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Amelia and Bonini 2020: The fossil studied in this contribution comes from facies of reddish and greyish massive sandstones, often interbedded by parallel laminated sandstone with calcretes and rhizoconcretions, assigned to the El Áspero Member, Chiquimil Formation (Fig. 1C). Concerning to chronological aspects, the El Áspero Member was dated from the andesitic intrusive bodies that crop out near the Villavil locality, approximately 30 km NW of the WSCP (Fig. 1C), and yield an age of 9.14 ± 0.09 Ma (Sasso, 1997). Therefore, an age of approximately 9 Ma (i.e., early late Miocene, Tortonian, sensu International Chronostratigraphic Chart, ICC; Cohen et al., 2013) is herein proposed for the time of deposition of the fossiliferous levels in the El Áspero Member in WSCP. | |||||
Lithology and environment
| Primary lithology: | massive,gray,red sandstone |
| Includes fossils? | Y |
| Lithology description: Armella et al. 2018: These levels are character- ized by fine to medium sandstones, irregularly coherent, reddish brown with boulders and layers of sabulites that pass upward to massive siltstones. | |
| Environment: | lacustrine indet. |
| Geology comments: Armella and Bonini 2020: a section of the El Áspero Member is represented by a great deposit of lacustrine sediments which would have been originated by an endorsement produced by the volcanic rocks (Bossi et al., 1999). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Armella and Bonini 2020: The new Interatheriidae specimen here described (MCH-P 257) is housed in the Museo Condor Huasi de Belén, Belén Department, Catamarca Province, and was found on a field trip carried out in 2015 in the WSCP. | |
Metadata
| Database number: | 212305 | ||
| Authorizer: | P. Mannion | Enterer: | G. Varnham |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2020-08-09 18:24:34 | Last modified: | 2020-08-09 13:24:57 |
| Access level: | the public | Released: | 2020-08-09 18:24:34 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 73334. | M. A. Armella and R. A. Bonini. 2020. Biostratigraphic significance of the presence of Protypotherium cf. P. antiquum Ameghino 1885 (Interatheriidae, Notoungulata) in the late Miocene of Northwestern Argentina. Journal of South American Earth Sciences 102:102676 [P. Mannion/G. Varnham/P. Mannion] |