The La Puerta Formation is a Late Jurassic to Early Cretaceous geologic formation of southern Bolivia. The fluvial and eolian sandstones preserve ichnofossils of Theropoda indet., Thyreophora indet., Ankylosauria indet. and Stegosauria indet. at the Tunasniyoj tracksite.[1] The formation is possibly a distal extension of the Botucatu Formation.[2] The Tunasniyoj assemblage is the oldest dinosaur tracksite for Bolivia, and includes the oldest known evidence assigned to ankylosaurs and stegosaurs for South America.[3]
| La Puerta Formation | |
|---|---|
| Stratigraphic range: Late Jurassic-Early Cretaceous ~ | |
| Type | Geological formation |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 19°30′S 64°48′W / 19.5°S 64.8°W |
| Approximate paleocoordinates | 19°36′S 31°00′W / 19.6°S 31.0°W |
| Region | Chuquisaca Department |
| Country |  Bolivia |
  La Puerta Formation, Bolivia (Bolivia) | |
See also
editReferences
edit- ^ Tunasniyoj tracksite at Fossilworks.org
- ^ Apesteguía & Gallina, 2011, p.268
- ^ Apesteguía & Gallina, 2011, p.275
Bibliography
edit- Apesteguía, Sebastián; Gallina, P.A. (2011), "Tunasniyoj, a dinosaur tracksite from the Jurassic-Cretaceous boundary of Bolivia" (PDF), Anais da Academia Brasileira de Ciências, 83 (1): 267–277, doi:10.1590/S0001-37652011000100015, PMID 21437385, retrieved 2019-03-03