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La Puerta Formation, Bolivia

Coordinates: 19°30′S 64°48′W / 19.5°S 64.8°W / -19.5; -64.8
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La Puerta Formation
Stratigraphic range: Late Jurassic-Early Cretaceous
~150–140 Ma
TypeGeological formation
Lithology
PrimarySandstone
Location
Coordinates19°30′S 64°48′W / 19.5°S 64.8°W / -19.5; -64.8
Approximate paleocoordinates19°36′S 31°00′W / 19.6°S 31.0°W / -19.6; -31.0
RegionChuquisaca Department
Country Bolivia
La Puerta Formation, Bolivia is located in Bolivia
La Puerta Formation, Bolivia
La Puerta Formation, Bolivia (Bolivia)

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]

See also

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References

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  1. ^ Tunasniyoj tracksite at Fossilworks.org
  2. ^ Apesteguía & Gallina, 2011, p.268
  3. ^ Apesteguía & Gallina, 2011, p.275

Bibliography

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  • 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