Los Chivos Hill, Cerro Barcino: Late Aptian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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| logs | ||||||||||
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Reptilia
- Testudines
- Chelidae
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| 11 specimens | ||||||||||
| MPEF-PV 3287-3297 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 43.0° South, 69.0° West (view map) | ||
| Paleocoordinates: | 39.2° South, 27.5° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Altitude: | 230 meters | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| *Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
| *International age/stage: | Maastrichtian | ||
| Key time interval: | Late Aptian | ||
| Age range of interval: | 119.57 - 113.2 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Chubut | Formation: | Cerro Barcino | Member: | Puesto La Paloma |
| Local section: | Los Chivos Hill | Local bed: | 6 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Ages are found 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: | desiccation cracks,wave ripples,planar lamination,tuffaceous cherty/siliceous mudstone |
| Includes fossils? | Y |
| Lithology description: "tuffaceous mudstone strata with a chert intercalation near the top; mudstones are massive by bioturbation in the base and pass upward to levels with plane parallel lamination or asymmetrical ripples." | |
| Environment: | lacustrine - small |
| Geology comments: shallow lacustrine | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Disassociated major elements: | all |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | surface (float),surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 26372 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2002-10-14 20:39:26 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-10-14 20:39:26 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 36670. | ETE | M. C. de la Fuente, A. M. Umazano, J. Sterli and J. L. Carballido. 2011. New chelid turtles of the lower section of the Cerro Barcino Formation (Aptian-Albian?), Patagonia, Argentina. Cretaceous Research 32:527-537 [M. Carrano/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] | |
| 17139 | ETE | R. Lydekker. 1879. Fossil Reptilia and Batrachia. Memoirs of the Geological Survey of India. Palaeontologia Indica, Series IV. Indian Pretertiary Vertebrata 1(3):1-36 [M. Carrano/M. Carrano] |