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
~
Mulichinco Formation at Puerta Curaco
TypeGeological formation
Unit ofMendoza Group
UnderliesAgrio Formation
OverliesVaca Muerta
Thickness200–400 metres (660–1,310 ft)
Lithology
PrimaryMudstone, siltstone, sandstone
OtherLimestone
Location
Coordinates38.5°S 70.2°W / -38.5; -70.2
Approximate paleocoordinates37.8°S 33.5°W / -37.8; -33.5
RegionNeuquén Province
CountryArgentina
ExtentNeuquén Basin
Mulichinco Formation is located in Argentina
Mulichinco Formation
Mulichinco Formation (Argentina)

Fossil content

Dinosaur remains have been found in the formation, including those of the dicraeosaurid Pilmatueia[2] and carcharodontosaurid Lajasvenator.[3] Flora recovered from the formation includes the tree fern Tempskya dernbachii and horsetail Equisetites.[4]

References

  1. Schwarz et al., 2005
  2. Coria et al., 2018
  3. Coria et al., 2019
  4. Martínez, Leandro C.A.; Olivo, Mariana S. (August 2015). "Tempskya in the Valanginian of South America (Mulichinco Formation, Neuquén Basin, Argentina) — Systematics, palaeoclimatology and palaeoecology". Review of Palaeobotany and Palynology. 219: 116–131. doi:10.1016/j.revpalbo.2015.04.002.

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(1). 109–138. .doi:10.1144/GSL.SP.2005.252.01.06Bibcode:2005GSLSP.252..109SISSN 0305-8719
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