Rancho Las Barretas: Late/Upper Maastrichtian, Mexico
collected by G. Barbosa Navéjar, S. Navéjar Torres, and A. Navéjar Ruiz 2001
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Mosasauridae
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Mosasauridae indet.
Gervais 1852
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Reynoso and Cruz 2014 | 1 individual | ||||||||
UANL-FCT-R4 | ||||||||||
see common names |
Geography
Country: | Mexico | State/province: | Nuevo Leon |
Coordinates: | 25.0° North, 99.5° West (view map) | ||
Paleocoordinates: | 31.0° North, 79.8° West | ||
Basis of coordinate: | stated in text |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
Key time interval: | Late/Upper Maastrichtian | ||
Age range of interval: | 70.60000 - 66.00000 m.y. ago |
Stratigraphy
Formation: | Mendez |
Stratigraphic resolution: | bed |
Lithology and environment
Primary lithology: | "shale" |
Secondary lithology: | marl |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: The unit is up to 1,000 m thick and consists of rhythmically bedded marls, shales, and minor sandstones. These were deposited in an open marine shelf environment in water depths of approximately 100 m near Los Ramones, 40 km north-east of Monterrey, and more than 400 m in the La Sierrita region, 40 km east of Montemorelos (Keller et al., 1997; Stinnesbeck et al., 2001). Planktic and benthic foraminiferal assemblages are rich and diverse throughout the Méndez Formation, whereas macrofossils, like inoceramids, ammonites, and vertebrate remains, are rare and known only from a few locations (Ifrim et al., 2004). | |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Temporal resolution: | snapshot |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection excludes: | all microfossils | ||
Collection methods: | survey of museum collection | ||
Collection size: | 1 specimens | ||
Reason for describing collection: | general faunal/floral analysis | ||
Collectors: | G. Barbosa Navéjar, S. Navéjar Torres, and A. Navéjar Ruiz | Collection dates: | October and November of 2001 |
Metadata
Database number: | 151073 | ||
Authorizer: | M. Uhen, M. Carrano | Enterer: | C. Peredo, M. Carrano |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2013-09-20 02:48:33 | Last modified: | 2022-07-01 12:01:38 |
Access level: | the public | Released: | 2013-09-20 02:48:33 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
48231. | M. C. Buchy, E. Frey, W. Stinnesbeck and J. G. Lopez-Olivia. 2007. Cranial anatomy of a Maastrichtian (Upper Cretaceous) mosasaur (Squamata, Mosasauridae) from north-east Mexico. Revista Mexicana de Ciencias Geologicas 24(1):89-103 [M. Uhen/C. Peredo] |
Secondary references:
82053 | V. H. Reynoso and J. A. Cruz. 2014. Mesozoic lepidosauromorphs of Mexico: a review and discussion of taxonomic assignments. In H. E. Rivera-Sylva, K. Carpenter, & E. Frey (eds.), Dinosaurs and Other Reptiles from the Mesozoic of Mexico 44-78 [M. Carrano/M. Carrano] |