Toro Toro Formation

The Toro Toro Formation is a Late Campanian geologic formation pertaining to the Puca Group of central Bolivia. The porous yellowish medium-to-coarse grained ferruginous (iron-containing) sandstones and mudstones with gypsum intercalations, deposited in a beach environment, preserve many ichnofossils of Ligabueichnium bolivianum, Dromaeopodus sp.,[1] Ornithopoda indet., Theropoda indet. and Titanosauridae indet.[2] The formation has provided the earliest known tracksite of dinosaurs in Bolivia.[3] The Toro Toro Formation represents part of the postrift stage in an alluvial to deltaic environment within the Potosí Basin. The formation is a local equivalent of the Chaunaca Formation.[4] The most famous of the dinosaur tracksites is Cal Orcko.

Toro Toro Formation Stratigraphic range: Late Campanian ~80–71 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Dinosaur ichnofossils in the Toro Toro Formation
Type	Geological formation
Unit of	Puca Group
Lithology
Primary	Sandstone
Other	Mudstone, gypsum
Location
Coordinates	18.1°S 65.8°W / -18.1; -65.8
Approximate paleocoordinates	21.3°S 47.8°W / -21.3; -47.8
Region	Cochabamba Department
Country	Bolivia
Extent	Potosí Basin
Type section
Named for	Torotoro National Park
Toro Toro Formation (Bolivia)

See also

• List of fossiliferous stratigraphic units in Bolivia
• List of stratigraphic units with dinosaur tracks
  • List of stratigraphic units with theropod tracks
• Cajones Formation
• La Puerta Formation

References

1. Apesteguía et al., 2011, p.663
2. Toro Toro, Pista de Danzas at Fossilworks.org
3. Lockley et al., 2002, p.389
4. Apesteguía et al., 2011, p.662

Bibliography

• Apesteguía, Sebastián; Silvina De Valais; Giovanni Ríos Cordero, and Omar Medina Ramírez. 2011. New Ichnological Record from the Late Campanian Toro Toro Formation at Toro Toro, Potosí (bolivia): First probable Dromaeosaurid Tracks from South America. Ameghiniana 48. 662–667. Accessed 2019-03-03.
• Lockley, M.G.; A.S. Schulp; C.A. Meyer; G. Leonardi, and D.K. Mamani. 2002. Titanosaurid trackways from the Upper Cretaceous of Bolivia: evidence for large manus, wide-gauge locomotion and gregarious behaviour. Cretaceous Research 23. 383–400. Accessed 2019-03-03.