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Coordinates: 38°52′10″S 68°51′20″W / 38.86944°S 68.85556°W / -38.86944; -68.85556
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The '''Sierra Barrosa Formation''' is a [[geologic formation]] of the [[Neuquén Basin]] in the northern [[Patagonia]]n provinces of [[Mendoza Province|Mendoza]] and [[Neuquén Province|Neuquén]]. The formation dates to the [[Late Cretaceous]], [[Coniacian|middle to late Coniacian]], and belongs to the [[Río Neuquén Subgroup]] of the [[Neuquén Group]]. The formation overlies the [[Los Bastos Formation]] and is overlain by the [[Plottier Formation]]. As the underlying Los Bastos Formation, the Sierra Barrosa Formation comprises [[mudstone]]s and [[sandstone]]s deposited in a [[fluvial]] [[depositional environment|environment]].
The '''Sierra Barrosa Formation''' is a [[geologic formation]] of the [[Neuquén Basin]] in the northern [[Patagonia]]n provinces of [[Mendoza Province|Mendoza]] and [[Neuquén Province|Neuquén]]. The formation dates to the [[Late Cretaceous]], [[Coniacian|middle to late Coniacian]], and belongs to the [[Río Neuquén Subgroup]] of the [[Neuquén Group]]. The formation overlies the [[Los Bastos Formation]] and is overlain by the [[Plottier Formation]]. As the underlying Los Bastos Formation, the Sierra Barrosa Formation comprises [[mudstone]]s and [[sandstone]]s deposited in a [[fluvial]] [[depositional environment|environment]].


== Description ==
==Description==
The formation was named by Garrido in 2010 as sandy unit conformably and transitionally overlying the [[Los Bastos Formation]], which in turns overlies the [[Portezuelo Formation]] within which both units were formerly included. The formation in the same manner underlies the [[Plottier Formation]], all belonging to the [[Río Neuquén Subgroup]] of the [[Neuquén Group]] in the [[Neuquén Basin]]. The unit now known as Sierra Barrosa Formation was included in the original definition by Herrero Ducloux (1938, 1939) as "Portezuelo Superior", as part of the "Portezuelo Beds" he described.<ref name=Garrido2011-p237>Garrido, 2011, p.237</ref>
The formation was named by Garrido in 2010 as sandy unit conformably and transitionally overlying the [[Los Bastos Formation]], which in turns overlies the [[Portezuelo Formation]] within which both units were formerly included. The formation in the same manner underlies the [[Plottier Formation]], all belonging to the [[Río Neuquén Subgroup]] of the [[Neuquén Group]] in the [[Neuquén Basin]]. The unit now known as Sierra Barrosa Formation was included in the original definition by Herrero Ducloux (1938, 1939) as "Portezuelo Superior", as part of the "Portezuelo Beds" he described.<ref name="Garrido2011-p237">{{Cite journal |last=Alberto |first=Garrido |date=May 2011 |title=El Grupo Neuquén (Cretácico Tardío) en la Cuenca Neuquina |url=https://www.researchgate.net/publication/268688238 |journal=18º Congreso Geológico Argentino |language=Spanish |pages=231–244}}</ref>


The type locality of the formation is located at the southern edge of the eponymous [[Sierra Barrosa]], to the east of Cerro Challacó. The formation at its type section reaches a thickness of {{convert|62|m|ft}}. The formation comprises fine-to-medium grained [[sandstone]]s intercalated by thin levels of [[mudstone]]s. The formation has similar lithological characteristics as the [[Portezuelo Formation]] and was deposited in a [[fluvial]] environment characterized by highly sinuous channels. Based on the stratigraphic relations with the overlying and underlying units, the age has been estimated to be middle to late [[Coniacian]].<ref name=Garrido2011-p237/>
The type locality of the formation is located at the southern edge of the eponymous [[Sierra Barrosa]], to the east of Cerro Challacó. The formation at its type section reaches a thickness of {{convert|62|m|ft}}. The formation comprises fine-to-medium grained [[sandstone]]s intercalated by thin levels of [[mudstone]]s. The formation has similar lithological characteristics as the [[Portezuelo Formation]] and was deposited in a [[fluvial]] environment characterized by highly sinuous channels. Based on the stratigraphic relations with the overlying and underlying units, the age has been estimated to be middle to late [[Coniacian]].<ref name=Garrido2011-p237/>


== Fossil content ==
==Fossil content==
===Crocodylomorphs===
The formation has provided fossils of:<ref name=FWSierraBarrosa>[http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Neuqu%E9n&formation=Sierra%20Barrosa&group_formation_member=Sierra%20Barrosa Sierra Barrosa Formation] at [[Fossilworks]].org</ref>
{| class="wikitable" align="center"
* [[Dinosaur]]s
|-
** ''[[Kaijutitan|Kaijutitan maui]]''<ref name=Filippi2019>Filippi et al., 2019</ref>
! colspan="6" align="center" | '''[[Crocodylomorph]]s reported from the Sierra Barrosa Formation'''
** ''[[Macrogryphosaurus|Macrogryphosaurus gondwanicus]]''<ref name=Calvo2005>Calvo et al., 2005</ref>
|-
** ''[[Mendozasaurus|Mendozasaurus neguyelap]]''<ref name=Gonzalez2003>González Riga, 2003</ref>
! Genus !! Species !! Presence
**''[[Murusraptor barrosaensis]]''
!'''Material'''!! Notes !! Images
** [[Maniraptora|Maniraptora indet.]]<ref name=Gonzalez2003/>
|-
** [[Allosauroidea|Allosauroidea indet.]]<ref>{{Cite journal |last=Baiano |first=Mattia Antonio |last2=Filippi |first2=Leonardo Sebastián |date=2022-01-26 |title=NEW ALLOSAUROID (THEROPODA, TETANURAE) REMAINS FROM THE SIERRA BARROSA FORMATION (MIDDLE CONIACIAN, UPPER CRETACEOUS), PATAGONIA, ARGENTINA |url=https://www.peapaleontologica.org.ar/index.php/peapa/article/view/396 |journal=Publicación Electrónica de la Asociación Paleontológica Argentina |language=en |volume=22 |issue=1 |pages=1–10–1–10 |doi=10.5710/PEAPA.25.10.2021.396 |issn=2469-0228|doi-access=free }}</ref>
|''[[Comahuesuchus]]''
|''C. bonapartei''
|Futalongko Quarry.<ref name=":0">{{Cite journal |last=Kellner |first=Alexander W. A. |last2=Figueiredo |first2=Rodrigo G. |last3=Calvo |first3=Jorge O. |date=2023 |title=A new species of ''Comahuesuchus'' Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |url=https://pubmed.ncbi.nlm.nih.gov/37585972/ |journal=Anais Da Academia Brasileira De Ciencias |volume=95 |issue=suppl 1 |pages=e20230179 |doi=10.1590/0001-3765202320230179 |issn=1678-2690 |pmid=37585972}}</ref>
|Partial right [[mandible]] (MUCPv 597).<ref name=":0" />
|A [[notosuchian]], locality may being to the [[Portezuelo Formation]].
|[[File:Comahuesuchus BW white background.jpg|center|150 px]]
|-
|}


== See also ==
===Dinosaurs===
====Ornithischians====
{| class="wikitable" align="center"
|-
! colspan="6" align="center" | '''[[Ornithischia]]ns reported from the Sierra Barrosa Formation'''
|-
! Genus !! Species !! Presence
!'''Material'''!! Notes !! Images
|-
|''[[Macrogryphosaurus]]''
|''M. gondwanicus''
|[[Mari Menuco Lake]].<ref name=":1">{{Cite journal |last=Rozadilla |first=Sebastián |last2=Cruzado-Caballero |first2=Penélope |last3=Calvo |first3=Jorge O. |date=April 2020 |title=Osteology of Ornithopod Macrogryphosaurus gondwanicus (Dinosauria, Ornithischia) from the Upper Cretaceous of Patagonia, Argentina |url=https://linkinghub.elsevier.com/retrieve/pii/S0195667119302460 |journal=Cretaceous Research |language=en |volume=108 |pages=104311 |doi=10.1016/j.cretres.2019.104311}}</ref>
|Near-complete skeleton.<ref name=":1" />
|An [[elasmarian]].
|[[File:Macrogryphosaurus life reconstruction.png|center|150 px]]
|-
|}

====Sauropods====
{| class="wikitable" align="center"
|-
! colspan="6" align="center" | '''[[Sauropod]]s reported from the Sierra Barrosa Formation'''
|-
! Genus !! Species !! Presence
!'''Material'''!! Notes !! Images
|-
|''[[Kaijutitan]]''
|''K. maui''
|Cañadón Mistringa.<ref name=":2">{{Cite journal |last=Filippi |first=Leonardo S. |last2=Salgado |first2=Leonardo |last3=Garrido |first3=Alberto C. |date=2019-08-01 |title=A new giant basal titanosaur sauropod in the Upper Cretaceous (Coniacian) of the Neuquén Basin, Argentina |url=https://www.sciencedirect.com/science/article/pii/S0195667118304816 |journal=Cretaceous Research |volume=100 |pages=61–81 |doi=10.1016/j.cretres.2019.03.008 |issn=0195-6671}}</ref>
|Partial skeleton.<ref name=":2" />
|A [[titanosaur]].
|
|-
|''[[Mendozasaurus]]''
|''M. neguyelap''
|Arroyo Seco.<ref name=":3">{{Cite journal |last=Bernardo J. Gonzalez |first=Riga |last2=Mannion |first2=Philip D. |last3=Poropat |first3=Stephen F. |last4=David |first4=Leonardo D. Ortiz |date=September 2018 |title=Osteology of the Late Cretaceous Argentinean sauropod dinosaur ''Mendozasaurus neguyelap'': implications for basal titanosaur relationships |url=https://academic.oup.com/zoolinnean/article/184/1/136/4816851 |journal=Zoological Journal of the Linnean Society |volume=184 |issue=1 |pages=136-181 |doi=10.1093/zoolinnean/zlx103}}</ref><ref name=":4">{{Cite journal |last=González Riga |first=B. J. |date=2003 |title=A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza Province, Argentina |url=https://www.ameghiniana.org.ar/index.php/ameghiniana/article/download/951/1714/10831 |journal=Ameghiniana |volume=40 |pages=155–172}}</ref>
|Partial skeleton and disarticulated bones.<ref name=":3" /><ref name=":4" />
|A [[titanosaur]].
|
|-
|}

====Theropods====
{| class="wikitable" align="center"
|-
! colspan="6" align="center" | '''[[Theropod]]s reported from the Sierra Barrosa Formation'''
|-
! Genus !! Species !! Presence
!'''Material'''!! Notes !! Images
|-
|[[Allosauroidea]] indet.
|Indeterminate
|Cañadón Mistringa.<ref name=":5">{{Cite journal |last=Baiano |first=Mattia |last2=Filippi |first2=Leonardo |date=2022 |title=Allosauroid (Theropoda, Tetanurae) remains from the Sierra Barrosa Formation (Middle Coniacian, Upper Cretaceous), Patagonia, Argentina. |url=https://www.researchgate.net/publication/358131442 |journal=Publicación Electrónica de la Asociación Paleontológica Argentina |volume=22 |issue=1 |pages=1-10 |doi=10.5710/PEAPA.25.10.2021.396}}</ref>
|Proximal end of left [[tibia]] (MAU-PV-CM-653).<ref name=":5" />
|An [[allosauroid]].
|
|-
|[[Maniraptora]] indet.
|Indeterminate
|Arroyo Seco.<ref name=":4" />
|
|A [[maniraptora]]n.
|
|-
|''[[Murusraptor]]''
|''M. barrosaensis''
|Sierra Barrosa.<ref name=":6">{{Cite journal |last=Coria |first=Rodolfo A. |last2=Currie |first2=Philip J. |date=2016-07-20 |title=A New Megaraptoran Dinosaur (Dinosauria, Theropoda, Megaraptoridae) from the Late Cretaceous of Patagonia |url=https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0157973 |journal=PLOS ONE |language=en |volume=11 |issue=7 |pages=e0157973 |doi=10.1371/journal.pone.0157973 |issn=1932-6203 |pmc=PMC4954680 |pmid=27439002}}</ref>
|Partial skeleton (MCF-PVPH-411).<ref name=":6" />
|A [[megaraptorid]].
|[[File:Murusraptor NT small.jpg|center|150 px]]
|-
|}

==See also==
* [[List of dinosaur bearing rock formations]]
* [[List of dinosaur bearing rock formations]]


== References ==
==References==
{{Reflist|20em}}
{{Reflist|20em}}

=== Bibliography ===
<!--most recent first-->
* {{cite LSA |first=L.S. |last=Filippi |first2=L. |last2=Salgado |first3=A.C. |last3=Garrido |year=2019 |title=A new giant basal titanosaur sauropod in the Upper Cretaceous (Coniacian) of the Neuquén Basin, Argentina |journal=[[Cretaceous Research]] |volume=100 |pages=61–81}}
* {{cite LSA |last=Garrido |first=Alberto C |year=2011 |title=El Grupo Neuquén (Cretácico Tardío) en la Cuenca Neuquina |url=https://www.researchgate.net/publication/268688238_Garrido_AC_2011_El_Grupo_Neuquen_Cretacico_Tardio_en_la_Cuenca_Neuquina |publisher=XVIII Congreso Geológico Argentino |pages=231–244 |accessdate=2020-07-07}}
* {{cite LSA |last=Calvo |first=Jorge O. |last2=Porfiri |first2=Juan D. |last3=Novas |first3=Fernando E. |year=2007 |title=Discovery of a new ornithopod dinosaur from the Portezuelo formation (Upper Cretaceous), Neuquen, Patagonia, Argentina |url=https://www.researchgate.net/profile/Juan_Porfiri/publication/233735488_Discovery_of_a_new_ornithopod_dinosaur_from_the_Portezuelo_Formation_Upper_Cretaceous_Neuquen_Patagonia_Argentina/links/02e7e529d65eaa5f1b000000/Discovery-of-a-new-ornithopod-dinosaur-from-the-Portezuelo-Formation-Upper-Cretaceous-Neuquen-Patagonia-Argentina.pdf |journal=[[Arquivos do Museu Nacional, Rio de Janeiro]] |volume=65 |issue=4 |pages=471-483}}
* {{cite LSA |first=B.J |last=González Riga |year=2003 |title=A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza Province, Argentina |journal=[[Ameghiniana]] |volume=40 |pages=155–172}}


[[Category:Geologic formations of Argentina]]
[[Category:Geologic formations of Argentina]]

Revision as of 14:08, 19 August 2023

Sierra Barrosa Formation
Stratigraphic range: Mid-late Coniacian
~88–86 Ma
↓
TypeGeological formation
Unit ofNeuquén Group
 Río Neuquén Subgroup
UnderliesPlottier Formation
OverliesLos Bastos Formation
ThicknessUp to 62 m (203 ft)
Lithology
PrimaryMudstone
OtherSandstone
Location
Coordinates38°52′10″S 68°51′20″W / 38.86944°S 68.85556°W / -38.86944; -68.85556
Approximate paleocoordinates42°48′S 48°24′W / 42.8°S 48.4°W / -42.8; -48.4
RegionMendoza & Neuquén Provinces
Country Argentina
ExtentNeuquén Basin
Type section
Named forSierra Barrosa
Named by2010
Year definedGarrido
Sierra Barrosa Formation is located in Argentina
Sierra Barrosa Formation
Sierra Barrosa Formation (Argentina)

The Sierra Barrosa Formation is a geologic formation of the Neuquén Basin in the northern Patagonian provinces of Mendoza and Neuquén. The formation dates to the Late Cretaceous, middle to late Coniacian, and belongs to the Río Neuquén Subgroup of the Neuquén Group. The formation overlies the Los Bastos Formation and is overlain by the Plottier Formation. As the underlying Los Bastos Formation, the Sierra Barrosa Formation comprises mudstones and sandstones deposited in a fluvial environment.

Description

The formation was named by Garrido in 2010 as sandy unit conformably and transitionally overlying the Los Bastos Formation, which in turns overlies the Portezuelo Formation within which both units were formerly included. The formation in the same manner underlies the Plottier Formation, all belonging to the Río Neuquén Subgroup of the Neuquén Group in the Neuquén Basin. The unit now known as Sierra Barrosa Formation was included in the original definition by Herrero Ducloux (1938, 1939) as "Portezuelo Superior", as part of the "Portezuelo Beds" he described.[1]

The type locality of the formation is located at the southern edge of the eponymous Sierra Barrosa, to the east of Cerro Challacó. The formation at its type section reaches a thickness of 62 metres (203 ft). The formation comprises fine-to-medium grained sandstones intercalated by thin levels of mudstones. The formation has similar lithological characteristics as the Portezuelo Formation and was deposited in a fluvial environment characterized by highly sinuous channels. Based on the stratigraphic relations with the overlying and underlying units, the age has been estimated to be middle to late Coniacian.[1]

Fossil content

Crocodylomorphs

Crocodylomorphs reported from the Sierra Barrosa Formation
Genus Species Presence Material Notes Images
Comahuesuchus C. bonapartei Futalongko Quarry.[2] Partial right mandible (MUCPv 597).[2] A notosuchian, locality may being to the Portezuelo Formation.

Dinosaurs

Ornithischians

Ornithischians reported from the Sierra Barrosa Formation
Genus Species Presence Material Notes Images
Macrogryphosaurus M. gondwanicus Mari Menuco Lake.[3] Near-complete skeleton.[3] An elasmarian.

Sauropods

Sauropods reported from the Sierra Barrosa Formation
Genus Species Presence Material Notes Images
Kaijutitan K. maui Cañadón Mistringa.[4] Partial skeleton.[4] A titanosaur.
Mendozasaurus M. neguyelap Arroyo Seco.[5][6] Partial skeleton and disarticulated bones.[5][6] A titanosaur.

Theropods

Theropods reported from the Sierra Barrosa Formation
Genus Species Presence Material Notes Images
Allosauroidea indet. Indeterminate Cañadón Mistringa.[7] Proximal end of left tibia (MAU-PV-CM-653).[7] An allosauroid.
Maniraptora indet. Indeterminate Arroyo Seco.[6] A maniraptoran.
Murusraptor M. barrosaensis Sierra Barrosa.[8] Partial skeleton (MCF-PVPH-411).[8] A megaraptorid.

See also

References

  1. ^ a b Alberto, Garrido (May 2011). "El Grupo Neuquén (Cretácico Tardío) en la Cuenca Neuquina". 18º Congreso Geológico Argentino (in Spanish): 231–244.
  2. ^ a b Kellner, Alexander W. A.; Figueiredo, Rodrigo G.; Calvo, Jorge O. (2023). "A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina". Anais Da Academia Brasileira De Ciencias. 95 (suppl 1): e20230179. doi:10.1590/0001-3765202320230179. ISSN 1678-2690. PMID 37585972.
  3. ^ a b Rozadilla, Sebastián; Cruzado-Caballero, Penélope; Calvo, Jorge O. (April 2020). "Osteology of Ornithopod Macrogryphosaurus gondwanicus (Dinosauria, Ornithischia) from the Upper Cretaceous of Patagonia, Argentina". Cretaceous Research. 108: 104311. doi:10.1016/j.cretres.2019.104311.
  4. ^ a b Filippi, Leonardo S.; Salgado, Leonardo; Garrido, Alberto C. (2019-08-01). "A new giant basal titanosaur sauropod in the Upper Cretaceous (Coniacian) of the Neuquén Basin, Argentina". Cretaceous Research. 100: 61–81. doi:10.1016/j.cretres.2019.03.008. ISSN 0195-6671.
  5. ^ a b Bernardo J. Gonzalez, Riga; Mannion, Philip D.; Poropat, Stephen F.; David, Leonardo D. Ortiz (September 2018). "Osteology of the Late Cretaceous Argentinean sauropod dinosaur Mendozasaurus neguyelap: implications for basal titanosaur relationships". Zoological Journal of the Linnean Society. 184 (1): 136–181. doi:10.1093/zoolinnean/zlx103.
  6. ^ a b c González Riga, B. J. (2003). "A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza Province, Argentina". Ameghiniana. 40: 155–172.
  7. ^ a b Baiano, Mattia; Filippi, Leonardo (2022). "Allosauroid (Theropoda, Tetanurae) remains from the Sierra Barrosa Formation (Middle Coniacian, Upper Cretaceous), Patagonia, Argentina". Publicación Electrónica de la Asociación Paleontológica Argentina. 22 (1): 1–10. doi:10.5710/PEAPA.25.10.2021.396.
  8. ^ a b Coria, Rodolfo A.; Currie, Philip J. (2016-07-20). "A New Megaraptoran Dinosaur (Dinosauria, Theropoda, Megaraptoridae) from the Late Cretaceous of Patagonia". PLOS ONE. 11 (7): e0157973. doi:10.1371/journal.pone.0157973. ISSN 1932-6203. PMC 4954680. PMID 27439002.{{cite journal}}: CS1 maint: PMC format (link) CS1 maint: unflagged free DOI (link)
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