Toqui Formation

Toqui Formation
Toqui Formation
Stratigraphic range: Tithonian; ~147 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Cast of Chilesaurus from the Toqui Formation
Type	Geological formation
Unit of	Coihaique Group
Underlies	Katterfeld Formation
Overlies	Ibáñez Formation
Thickness	300–320 m (980–1,050 ft)
Lithology
Primary	Conglomerate, sandstone, tuffite, ignimbrite
Location
Coordinates	46.6°S 72.4°W
Approximate paleocoordinates	44.8°S 32.4°W
Region	Aysén Region
Country	Chile
	Toqui Formation (Chile)

The Toqui Formation is a geological formation in the Aysén Region of southern Chile. It has been dated to the Tithonian stage of the Late Jurassic by uranium–lead dating of zircons, providing ages between 148.7 ± 1.4 Ma and 147 ± 1.0 Ma.^[1] It consists of a sequence of clastic sedimentary sandstones and conglomerates, interbedded with volcanic tuffs and ignimbrite.^[2] The dinosaurs Chilesaurus and indeterminate diplodocids and the mesoeucrocodylian Burkesuchus are known from the formation.^[3]^[4]^[5] The formation was deposited in a fluvio-deltaic environment.^[6]

Quick Facts Type, Unit of ...

Genus	Species	Material	Notes	Images
Burkesuchus	B. mallingrandensis	"Fragmented skull and partial postcrania."^[5]	A neosuchian.
Crocodylomorpha indet.	Indeterminate	"Partial postcrania."^[7]	A neosuchian.

Genus	Species	Material	Notes
Chilesaurus	C. diegosuarezi	"Skull with and skeletons from multiple specimens."^[3]^[8]	A dinosaur with uncertain affinities.
Diplodocidae indet.	Indeterminate	"Cervical centra."^[4]	A diplodocid.
Diplodocinae indet.	Indeterminate	"Partial caudal vertebra."^[4]	A diplodocin.
Sauropoda indet.	Indeterminate	"Partial dorsal vertebra."^[4]	A sauropod.
	Indeterminate	"Two caudal vertebrae centra."^[4]	A sauropod.
	Indeterminate	"Partial sternal plate."^[4]	A sauropod.
Titanosauriformes? indet.	Indeterminate	"Lower end of left femur."^[4]	A titanosauriform.
Titanosauriformes? indet.	Indeterminate	"Lower end of right tibia."^[4]	A titanosauriform.

Paleobiota of the Toqui Formation