Toro Toro Formation
Toro Toro Formation | |
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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 | ![]() ![]() Toro Toro Formation (Bolivia) |
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, however these are in the El Molino Formation
See also
- List of fossiliferous stratigraphic units in Bolivia
- List of stratigraphic units with dinosaur tracks
- Cajones Formation
- La Puerta Formation
References
- ^ Apesteguía et al., 2011, p.663
- ^ Toro Toro, Pista de Danzas at Fossilworks.org
- ^ Lockley et al., 2002, p.389
- ^ Apesteguía et al., 2011, p.662
Bibliography
- Apesteguía, Sebastián; De Valais, Silvina; Ríos Cordero, Giovanni; Medina Ramírez, Omar (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 (4): 662–667, doi:10.5710/AMGH.v48i4(341), hdl:11336/9519, retrieved 2019-03-03
- Lockley, M.G.; Schulp, A.S.; Meyer, C.A.; Leonardi, G.; Mamani, D.K. (2002), "Titanosaurid trackways from the Upper Cretaceous of Bolivia: evidence for large manus, wide-gauge locomotion and gregarious behaviour", Cretaceous Research, 23 (3): 383–400, Bibcode:2002CrRes..23..383L, doi:10.1006/cres.2002.1006, retrieved 2019-03-03