Huayquerías Formation
{{Short description|Geological formation in Argentina}}
{{Infobox rockunit
| name = Huayquerías Formation
| period = Messinian
| age = Messinian-Zanclean
(defined as Huayquerian)
~{{fossil range|6.5|5}}
| image =
| imagesize =
| caption =
| type = Geological formation
| prilithology = Mudstone
| otherlithology = Sandstone, tuff
| unitof =
| subunits =
| underlies = Tunuyán Formation
| overlies =
| thickness = Up to {{convert|126|m|ft|abbr=on}}
| area =
| map = {{Location map+ | Argentina
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | Argentina
| lat_deg = -33.8
| lon_deg = -69.0
| mark = Yellow ffff00 pog.svg
| marksize = 12
}}
}}
| map_caption =
| location =
| coordinates = {{coord|33.8|S|69.0|W|display=inline,title}}
| paleocoordinates = {{coord|34.0|N|66.9|W|display=inline}}
| region = Mendoza Province
| country = Argentina
| extent = Frontal Cordillera & Cuyo Basin
| namedfor =
| namedby = Kraglievitch
| year_ts = 1934
| location_ts =
| coordinates_ts =
| paleocoordinates_ts =
| region_ts = Mendoza Province
| country_ts = Argentina
| thickness_ts =
}}
The Huayquerías Formation ({{langx|es|Formación Huayquerías}}) is a Late Miocene fossiliferous geological formation of the Frontal Cordillera and Cuyo Basin of Argentina. The formation crops out in the central Mendoza Province.
The formation, with a maximum thickness of {{convert|126|m|ft}}, comprises reddish mudstones with thin beds of tuffs and sandstones, deposited in a fluvial, environment. The tuff in the formation is dated to 5.84 ± 0.41 Ma, placing it in the Huayquerian SALMA, the age named after the formation by Kraglievitch in 1934.
The formation has provided fossils of the procyonid Cyonasua pascuali and the litoptern Huayqueriana cristata, named after the formation.
Description
The Huayqueriás Formation, present in the Frontal Cordillera and the neighboring Cuyo Basin, was described in 1934 by Kraglievitch as the basis for the Huayquerian South American land mammal age. The name Huayquerías means "badlands".Forasiepi et al., 2016, p.1 The formation comprises reddish mudstones with mudcracks, paleoburrows and ichnofossils of vertebrates. Thin sandstone layers of up to {{convert|12|cm|in}} thick exist in the formation. An ashfall bed exists at {{convert|83|m|ft}} below the contact with the slightly angular unconformablyYrigoyen, 1993 overlying Tunuyán Formation in a total section of {{convert|126|m|ft}}.Garrido et al, 2017, p.51 The tuff has been dated using 40K/40Ar analysis to 5.84 ± 0.41 Ma.Marshall et al., 1986
Paleontological significance
{{see also|Huayquerian}}
The Huayquerías Formation has been used to define the Huayquerian South American land mammal age, ranging from 9.0 to 6.8 Ma. However, later analysis of the ashfall bed in the formation, provided a much younger age of 5.84 ± 0.41 Ma, extending the temporal range of the Huayquerian SALMAans until near the Miocene-Pliocene limit. The Huayqueriás Formation has provided fossils of Cyonasua pascuali,Linares, 1981, p.118 and the litoptern Huayqueriana cristata, the latter of which, named after the formation.
See also
{{clear}}
References
{{reflist|20em}}
= Bibliography =
;Geology
- {{citation |last1=Garrido |first1=Alberto C. |last2=Bonini |first2=Ricardo |last3=Barbeau |first3=David L. |year=2017 |title=Paleoambiente, edad y vertebrados de la Formación Huayquerías, Mioceno Tardío, Provincia de Mendoza, Republica Argentina |url=https://www.researchgate.net/publication/319550096 |publisher=XX Congreso Geológico Argentino |pages=50–55 |accessdate=2019-03-08}}
- {{citation |last1=Marshall |first1=L.G. |last2=Drake |first2=Robert E. |last3=Curtis |first3=Garniss H. |year=1986 |title=40K-40Ar age calibration of late Miocene-Pliocene mammal-bearing Huayquerías and Tunuyán Formations, Mendoza Province, Argentina |url=https://www.researchgate.net/publication/284581506 |journal=Journal of Paleontology |volume=60 |issue=2 |pages=448–457 |doi=10.1017/S002233600002196X |accessdate=2019-03-08}}
- {{citation |last=Yrigoyen |first=Marcelo R |year=1993 |title=Revisión estratigráfica del Neogeno de las Huayquerías de Mendoza septentrional, Argentina |url=http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2198 |journal=Ameghiniana |volume=31 |pages=125–138 |accessdate=2019-03-08}}
;Paleontology
- {{citation |last1=Forasiepi |first1=Analía M. |last2=MacPhee |first2=Ross D.E. |last3=Hernández del Pino |first3=Santiago |last4=Schmidt |first4=Gabriela I. |last5=Amson |first5=Eli |last6=Grohé |first6=Camille |year=2016 |title=Exceptional skull of Huayqueriana (Mammalia, Litopterna, Macraucheniidae) from the Late Miocene of Argentina: anatomy, systematics and paleobiological implications |url=http://www.digitallibrary.amnh.org/bitstream/handle/2246/6659/B404.pdf?sequence=1&isAllowed=y |journal=Bulletin of the American Museum of Natural History |volume=404 |pages=1–76 |doi=10.1206/0003-0090-404.1.1 |accessdate=2018-10-01}}
- {{citation |last=Linares |first=O.J |year=1981 |title=Tres nuevos carnivoros Procionidos fósiles del Mioceno de Norte y Sudamerica |url=https://www.researchgate.net/publication/273426296 |journal=Ameghiniana |volume=18 |pages=113–121 |accessdate=2019-03-08}}
{{SALMA}}
{{DEFAULTSORT:Huayquerias Formation}}
Category:Geologic formations of Argentina
Category:Miocene Series of South America
Category:Mudstone formations of Argentina
Category:Tuff formations of Argentina
Category:Fossiliferous stratigraphic units of South America