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)