northwest shore tracksite, Lake Ezequiel Ramos Mexia: Early/Lower Cenomanian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Temnospondyli
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Avitabatrachus sp.
Báez et al. 2000
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Báez et al. 2022 | 1 individual | ||||||||
| MMCh-PV 259, several incomplete postcranial elements | ||||||||||
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Reptilia
- Pteraichnidae
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Pteraichnus sp.
Stokes 1957
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Calvo and Lockley 2001 | |||||||||
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Reptilia
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Theropoda indet.
(Marsh 1881)
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5 individuals | |||||||||
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Ornithopoda indet.
Marsh 1881
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9 individuals | |||||||||
| trackways | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Neuquén |
| Coordinates: | 39.3° South, 68.8° West (view map) | ||
| Paleocoordinates: | 46.4° South, 45.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| *Period: | Early/Lower Cretaceous - Late/Upper Cretaceous | ||
| *International age/stage: | Albian - Cenomanian? | ||
| Key time interval: | Early/Lower Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Neuquén | Formation: | Candeleros | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: lower part of Candeleros (orig. a member); Río Limay Subgroup | |||||
Lithology and environment
| Primary lithology: | sandstone |
| Includes fossils? | Y |
| Lithology description: fine- and medium-grained sandstone | |
| Environment: | fluvial-lacustrine indet. |
| Geology comments: "temperate climate with alternate rainy and dry seasons...shallow-water fluvio-lacustrine systems (lakes and meandering rivers). The tracks were evidently made...on the shores of such lakes." | |
Taphonomy
| Modes of preservation: | trace |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Associated major elements: | some |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,surface (in situ),peel or thin section,field collection,survey of museum collection,observed (not collected) |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | Villa El Chocón | ||
| Database number: | 28004 | ||
| Authorizer: | M. Carrano, P. Mannion | Enterer: | M. Carrano, G. Varnham |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2003-01-19 19:09:21 | Last modified: | 2022-03-03 06:39:27 |
| Access level: | the public | Released: | 2003-01-19 19:09:21 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 34274. | ETE | J. O. Calvo, R. A. Coria, and L. Salgado. 1990. Nuevas localidades con huellas de dinosaurios del Miembro Candeleros (Albiano–Cenomaniano, Formación Río Limay, Grupo Neuquén), Provincia del Neuquén, Argentina [New localities with dinosaur tracks from the Candeleros Member (Albian–Cenomanian, Río Limay Formation, Neuquén Group), Neuquén Province, Argentina]. VII Jornadas Argentinas de Paleontología de Vertebrados. Ameghiniana 26(3-4):241 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 80445 | A. M. Báez, P. Muzzopappa, and O. G. Santos Araújo. 2022. New remains from the Cenomanian Candeleros Formation, Neuquén Basin (Patagonia, Argentina) provide insights into the formation of the sacro-urostylic complex in early pipimorph frogs (Amphibia, Anura). Cretaceous Research 129:105026 [P. Mannion/G. Varnham/P. Mannion] | |
| 7667 | J. O. Calvo and M. G. Lockley. 2001. The first pterosaur tracks from Gondwana. Cretaceous Research 22:585-590 [M. Carrano/M. Carrano/M. Carrano] |