Coordinates: 38°30′S 70°12′W / 38.5°S 70.2°W / -38.5; -70.2

Mulichinco Formation

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Mulichinco Formation
Stratigraphic range: Valanginian
~140–136 Ma
↓
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°30′S 70°12′W / 38.5°S 70.2°W / -38.5; -70.2
Approximate paleocoordinates37°48′S 33°30′W / 37.8°S 33.5°W / -37.8; -33.5
RegionNeuquén Province
CountryArgentina
ExtentNeuquén Basin
Mulichinco Formation is located in Argentina
Mulichinco Formation
Mulichinco Formation (Argentina)

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]

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. hdl:11336/49538.

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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