Mulichinco Formation

The Mulichinco Formation is a geological formation in Argentina. It is Valanginian in age and is predominantly terrestrial, being deposited at a time of marine regression in the Neuquén Basin, and predominantly consists of siliciclastic rocks.[1]

Mulichinco Formation Stratigraphic range: Valanginian ~140–136 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Mulichinco Formation at Puerta Curaco
Type	Geological formation
Unit of	Mendoza Group
Underlies	Agrio Formation
Overlies	Vaca Muerta
Thickness	200–400 metres (660–1,310 ft)
Lithology
Primary	Mudstone, siltstone, sandstone
Other	Limestone
Location
Coordinates	38.5°S 70.2°W
Approximate paleocoordinates	37.8°S 33.5°W
Region	Neuquén Province
Country	Argentina
Extent	Neuquén Basin
Mulichinco Formation (Argentina)

Fossil content

Dinosaur remains have been found in the formation, including those of the dicraeosaurid Pilmatueia[2] and carcharodontosaurid Lajasvenator.[3]

References

1. Schwarz et al., 2005
2. Coria et al., 2018
3. Coria et al., 2019

Bibliography

• Coria, Rodolfo A.; Philip J. Currie; Francisco Ortega, and Mattia A. Baiano. 2019. An Early Cretaceous, medium-sized carcharodontosaurid theropod (Dinosauria, Saurischia) from the Mulichinco Formation (upper Valanginian), Neuquén Province, Patagonia, Argentina. Cretaceous Research 111. 104319. doi:10.1016/j.cretres.2019.104319
• Coria, Rodolfo A.; Guillermo J. Windholz; Francisco Ortega, and Philip J. Currie. 2018. A new dicraeosaurid sauropod from the Lower Cretaceous (Mulichinco Formation, Valanginian, Neuquén Basin) of Argentina. Cretaceous Research 93. 33–48. doi:10.1016/j.cretres.2018.08.019
• Gnaedinger, S.; R. A. Coria; E. Koppelhus; S. Casadío; M. Tunik, and P. Currie. 2017. First Lower Cretaceous record of Podocarpaceae wood associated with dinosaur remains from Patagonia, Neuquén Province, Argentina. Cretaceous Research 78. 228-239.
• Schwarz, Ernesto, and John A. Howell. 2005. Sedimentary evolution and depositional architecture of a lowstand sequence set: the Lower Cretaceous Mulichinco Formation, Neuquén Basin, Argentina. Geological Society, London, Special Publications 252. 109–138. doi:10.1144/GSL.SP.2005.252.01.06Bibcode:2005GSLSP.252..109SISSN 0305-8719