Buena Vista Formation Explained

Buena Vista Formation
Type:	Geological formation
Period:	Late Permian-Early Triassic
Age:	Late Permian-Early Triassic ~
Prilithology:	Sandstone, mudstone
Otherlithology:	Conglomerate
Region:	Cerro Largo Department
Coordinates:	-32.3°N -54.1°W
Paleocoordinates:	-40.2°N -15.7°W
Underlies:	Tacuarembó Formation
Overlies:	Yaguarí Formation
Extent:	Norte Basin

The Buena Vista Formation is a Late Permian-Early Triassic geologic formation of the Cerro Largo Department in northeastern Uruguay. The fluvial sandstones and mudstones preserve temnospondyl and archosaur fossils.

Description

The Buena Vista Formation is characterized by reddish fine sandstone interbedded with lenticular clay layers and intraformational conglomerates deposited in a fluvial environment.

Fossil content

The following fossils have been reported from the formation:^{[1] [2]}

• Temnospondyls
  • Arachana nigra^[3]
  • Uruyiella liminea
  • Dvinosauria indet.
  • Mastodonsauridae indet.
• Reptiles
  • Pintosaurus magnidentis
  • Archosauromorpha indet.

See also

• List of fossiliferous stratigraphic units in Uruguay

References

Bibliography

Notes and References

1. https://paleobiodb.org/classic/displayCollResults?collection_no=86401 Buena Vista Formation
2. Pineiro et al., 2003
3. . Alejandro Ramos . Claudia Marsicano . 2012 . A rhinesuchid-like temnospondyl from the Permo-Triassic of Uruguay . Comptes Rendus Palevol . 11 . 1 . 65–78 . 10.1016/j.crpv.2011.07.007 . 2012CRPal..11...65P .