San Martín Atexcal tracksite, Level IV: Aptian, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
|
|||||||
| see common names | |||||||
Geography
| Country: | Mexico | State/province: | Puebla |
| Coordinates: | 18.4° North, 97.7° West (view map) | ||
| Paleocoordinates: | 21.7° North, 43.4° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Aptian | 10 m.y. bin: | Cretaceous 3 |
| Key time interval: | Aptian | ||
| Age range of interval: | 121.4 - 113.2 m.y. ago |
Stratigraphy
| Formation: | San Juan Raya | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: upper part of formation; 6 track-bearing levels | |||||
Lithology and environment
| Primary lithology: | gray "shale" |
| Secondary lithology: | fine,medium,brown sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "originally registered on grayish shale; however, these are mostly preserved as convex hyporeliefs in brownish, fine to medium-grained sandstone layers" | |
| Environment: | lagoonal |
| Geology comments: "mudflat"; "a shallow lagoonal, tidal-flat setting, between reefs and the coast line" | |
Taphonomy
| Modes of preservation: | cast,trace |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | surface (in situ),observed (not collected) |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 226348 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2022-06-30 15:31:10 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2022-06-30 15:31:10 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 47964. | R. A. Rodríguez-de la Rosa, M. C. Aguillón-Martínez, and J. López-Espinoza. 2004. The fossil record of vertebrate tracks in Mexico. Ichnos 11:27-37 [M. Carrano/M. Carrano] |
Secondary references:
| 82045 | R. A. Rodríguez-de la Rosa, V. M. Bravo-Cuevas, E. Carrillo-Montiel and A. Ortiz-Ubilla. 2012. Lower Cretaceous dinosaur tracks from Puebla, Mexico. Journal of Geological Research 2012:808729:1-7 [M. Carrano/M. Carrano] |