Southeastern region of Lago Colhue Huapi: Coniacian - Maastrichtian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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| 1 specimen | ||||||||||
| UNPSJB-Pv 1051, articulated left hind limb and disarticulated but associated skeletal elements | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 45.6° South, 68.6° West (view map) | ||
| Paleocoordinates: | 46.6° South, 51.3° West (Wright 2013) | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Coniacian - Maastrichtian | 10 m.y. bin: | Cretaceous 6 - Cretaceous 8 |
| Key time interval: | Coniacian - Maastrichtian | ||
| Age range of interval: | 89.8 - 66 m.y. ago |
Stratigraphy
| Geological group: | Chubut | Formation: | Lago Colhué Huapi | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The fossils described herein (UNPSJB-Pv 1051) were recovered from medium sandstones that grade upward to fine sandstones at the top of the section | |||||
Lithology and environment
| Primary lithology: | massive,lenticular,planar lamination sandstone |
| Includes fossils? | Y |
| Lithology description: These sandstones are massive at the base and near the top and exhibit parallel lamination. They also show lenticular geometry, with concave-up bases and planar tops. | |
| Environment: | channel lag |
| Geology comments: The deposits in which the titanosaurian fossils were found are interpreted as a central bar developed within the main fluvial channel, which originated from a tractive and unidirectional flow. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | good |
| Fragmentation: | occasional |
| Bioerosion: | frequent |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Taxonomic list comments:UNPSJB, Universidad de la Patagonia “San Juan Bosco”, colección de Paleovertebrados, Chubut, Argentina | |
Metadata
| Also known as: | Rio Chico, Lago Colhue Huapi | ||
| Database number: | 230594 | ||
| Authorizer: | E. Vlachos | Enterer: | F. Aspromonte |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2023-07-06 08:57:34 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2023-07-06 08:57:34 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 85184. | L. M. Ibiricu, G. A. Casal, R. D. Martínez, M. Luna, E. G. Svoboda and I. A. Cerda. 2017. New materials of lithostrotian titanosaurs (Dinosauria: Sauropoda) from the Upper Cretaceous of central Patagonia. Cretaceous Research 73:25-39 [E. Vlachos/F. Aspromonte] |