El Indio, Cerro Chivo (sauropod site): Late Aptian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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| 4 specimens | ||||||||||
| two presacral vertebral centra, a tibia and an indeterminate limb bone | ||||||||||
| Poropat et al. 2017 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 43.2° South, 68.8° West (view map) | ||
| Paleocoordinates: | 39.5° South, 27.2° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| Key time interval: | Late Aptian | ||
| Age range of interval: | 119.57 - 113.2 m.y. ago |
Stratigraphy
| Geological group: | Chubut | Formation: | Cerro Barcino | Member: | Puesto La Paloma |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: basal unit of La Paloma Member
Based on Krause et al. 2020 and Carballido et al. 2017. The contact zones between Puesto La Paloma and Cerros Castaño is approximately Aptian-Early Albian at ~118.5-110.8 Ma. | |||||
Lithology and environment
| Primary lithology: | conglomerate |
| Includes fossils? | Y |
| Lithology description: "channel of reworked, conglomerate tuff" | |
| Environment: | lacustrine indet. |
| Geology comments: A playa lake environment with eolian deposits that was subjected to influxes of sediment from ephemeral fluvial systems and debris flows from higher elevations | |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | poor |
| Articulated whole bodies: | none |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 59289 | ||
| Authorizer: | M. Carrano, P. Mannion | Enterer: | K. Maguire, P. Mannion |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2006-03-24 13:15:40 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2006-03-24 13:15:40 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 16979. | ETE | O. W. M. Rauhut, G. Cladera, P. Vickers-Rich and T. H. Rich. 2003. Dinosaur remains from the Lower Cretaceous of the Chubut Group, Argentina. Cretaceous Research 24:487-497 [M. Carrano/K. Maguire/M. Carrano] |
Secondary references:
| 79276 | J. M. Krause, J. Ramezani, A. M. Umazano, D. Pol, J. L. Carballido, J. P. Sterli Puerta, N. R. Cúneo and E. S. Bellosi. 2020. High-resolution chronostratigraphy of the Cerro Barcino Formation (Patagonia): Paleobiologic implications for the mid-cretaceous dinosaur- rich fauna of South America. Gondwana Research 80:33-49 [P. Mannion/G. Varnham/G. Varnham] | |
| 62878 | S. F. Poropat, J. P. Nair, C. E. Syme, P. D. Mannion, P. Upchurch, S. A. Hocknull, A. G. Cook, T. R. Tischler, and T. Holland. 2017. Reappraisal of Austrosaurus mckillopi Longman, 1933 from the Allaru Mudstone of Queensland, Australia’s first named Cretaceous sauropod dinosaur. Alcheringa 41(4):543-580 [P. Mannion/P. Mannion/P. Mannion] |