Estancia Pampa Grande, between river Pablo and river Bordo: Lutetian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Mammalia
- Notoungulata
- Isotemnidae
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| 5 specimens | ||||||||||
| MLP 78-V-6-8 (holotype). MLP 78-V-6-10, MLP 77-V-3-2, MLP 78-V-6-13, MLP 7&-V-6-6 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Salta | County: | Guachipas |
| Coordinates: | 25.5° South, 65.5° West (view map) | ||||
| Paleocoordinates: | 27.0° South, 53.9° West (Wright 2013) | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Lutetian | 10 m.y. bin: | Cenozoic 2 |
| Key time interval: | Lutetian | Mammal zone: | Casamayoran |
| Age range of interval: | 48.07 - 41.03 m.y. ago |
Stratigraphy
| Geological group: | Salta | Formation: | Lumbrera | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Upper unit of Santa Barbara subgroup of Salta Group
Powell et al., 2011: Recently, geologic and paleontologic evidence allowed the correlation of the upper levels of Lumbrera with Geste, Casa Grande, and Quebrada de los Colorados Formations. Additionally, these levels were referred to the late-middle Eocene (Casamayoran SALMA -South American Land Mammal Age-, Barrancan subage) by an U/Pb dating of 39.9 Ma . The lower levels of the Lumbrera Formation are here referred to the Vacan subage of the Casamayoran SALMA. Fernicola et al. 2021: new 238U-206Pb isochron age (46.2 Ma) obtained from samples taken on various independent points across paleosol and matrix positioned at the top of the lower section of the Lumbrera Formation. The new age is consistent with the hyperthermal scheme and constrains the deposition of the lower section of the Lumbrera Fm. between 55–46.2 Ma. Subsequently, the upper sections of the Lumbrera Formation are now constrained between 46 and 40 Ma (Lutetian) (see Fernicola et al. 2021: New assemblage of cingulates) | |||||
Lithology and environment
| Primary lithology: | not reported |
| Includes fossils? | Y |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 175897 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2016-01-17 02:25:07 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | database members | Released: | 2017-01-17 02:25:07 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 57640. | M. G. Vucetich and M. Bond. 1982. Los primeros Isotemnidae (Mammalia, Notoungulata) registrados en la Formación Lumbrera (Grupo Salta), del Noroeste Argentino. Ameghiniana 16:1-2-7-18 [R. Butler/R. Butler] |