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{{Short description|Geologic age}}
The '''Riochican''' ({{langx|es|Riochiquense}}) age is a period of [[geologic time]] (57.0–54.0 [[Mya (unit)|Ma]]) within the [[Paleocene]] and [[Eocene]] epochs of the [[Paleogene]], used more specifically within the [[South American land mammal age]]s (SALMA). It follows the [[Peligran]] and precedes the [[Itaboraian]] age.<ref>[https://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=736 Paleo Database: Riochican]</ref>

== Etymology ==
This age is named after the [[Río Chico Group]] of the [[Golfo San Jorge Basin]].

== Formations ==
{{Location map+ | South America
| relief = 1
| width = 300
| caption = Locations of Riochican formations
| places =
{{Location map~ | South America
| lat_deg = -5.5
| lon_deg = -78.6
| mark = Orange pog.svg
| marksize = 10
| link = Chota Formation
}}
{{Location map~ | South America
| lat_deg = 4.488444
| lon_deg = -74.135694
| mark = Orange pog.svg
| marksize = 10
| link = Bogotá Formation
}}
{{Location map~ | South America
| lat_deg = -43.7
| lon_deg = -67.8
| mark = Orange pog.svg
| marksize = 10
| link = Bororó Formation
}}
{{Location map~ | South America
| lat_deg = -26.1
| lon_deg = -65.4
| mark = Orange pog.svg
| marksize = 10
| link = Maíz Gordo Formation
}}
{{Location map~ | South America
| lat_deg = -23.1
| lon_deg = -65.6
| mark = Orange pog.svg
| marksize = 10
| link = Mealla Formation
}}
{{Location map~ | South America
| lat_deg = -26.6
| lon_deg = -65.2
| mark = Orange pog.svg
| marksize = 10
| link = Río Loro Formation
}}
{{Location map~ | South America
| lat_deg = -15.7
| lon_deg = -70.2
| mark = Orange pog.svg
| marksize = 10
| link = Muñani Formation
}}

{{Location map~ | South America
| lat_deg = -4.1
| lon_deg = -80.9
| mark = Orange pog.svg
| marksize = 10
| link = Mogollón Formation
}}
{{Location map~ | South America
| lat_deg = -45.6
| lon_deg = -69.1
| mark = Orange pog.svg
| marksize = 10
| link = Las Flores Formation, Austral Basin
}}
{{Location map~ | South America
| lat_deg = -45.3
| lon_deg = -67.0
| mark = Orange pog.svg
| marksize = 10
| link = Peñas Coloradas Formation
}}
{{Location map~ | South America
| lat_deg = -45.3
| lon_deg = -67.0
| mark = Orange pog.svg
| marksize = 14
| link = Río Chico Group
}}
}}
{| class="wikitable sortable"
! Formation {{small|bold is type}}
! Country
! Basin
! class=unsortable | Notes
|-
| '''[[Río Chico Group]]''' || {{ARG}} || [[Golfo San Jorge Basin]] || {{center|<ref name=Raigemborn2010_p240>Raigemborn et al., 2010, p.240</ref>}}
|-
| [[Bogotá Formation]] || {{COL}} || [[Altiplano Cundiboyacense]] || {{center|<ref name=Bayona_p103>Bayona et al., 2012, p.103</ref>}}
|-
| [[Bororó Formation]] || {{ARG}} || [[Golfo San Jorge Basin]] || {{center|<ref name=Scarfati2009_p36>Scarfati et al., 2009, p.36</ref>}}
|-
| [[Chota Formation]] || {{PER}} || [[Bagua Basin]] || {{center|<ref name=Chacaltana_p2>Chacaltana et al., 2015, p.2</ref><ref name=CastroMedina2010_p53>Castro Medina, 2010, p.53</ref>}}
|-
| [[Koluel Kaike Formation]] || {{ARG}} || [[Golfo San Jorge Basin]] || {{center|<ref name=Raigemborn2010_p251>Raigemborn et al., 2010, p.251</ref>}}
|-
| [[Las Flores Formation, Austral Basin|Las Flores Formation]] || {{ARG}} || [[Magallanes Basin|Austral Basin]] || {{center|<ref name=Raigemborn2010_p249>Raigemborn et al., 2010, p.249</ref>}}
|-
| [[Maíz Gordo Formation]] || {{ARG}} || [[Salta Basin]] || {{center|<ref name=Narvaez2009_p24>Narváez, 2009, p.24</ref>}}
|-
| [[Mealla Formation]] || {{ARG}} || [[Salta Basin]] || {{center|<ref name=Sanchez2010_p389>Sánchez & Marquillas, 2010, p.389</ref>}}
|-
| [[Mogollón Formation]] || {{PER}} || [[Talara Basin|Talara]] & [[Tumbes Basin]]s || {{center|<ref name=Quispe2010_p21>Quispe Alcalá, 2010, p.21</ref>}}
|-
| [[Muñani Formation]] || {{PER}} || [[Altiplano Basin]] || {{center|<ref name=GelfoGoin2011>Gelfo & Goin, 2011</ref>}}
|-
| [[Peñas Coloradas Formation]] || {{ARG}} || [[Golfo San Jorge Basin]] || {{center|<ref name=Clyde_p303>Clyde et al., 2014, p.303</ref>}}
|-
| [[Río Loro Formation]] || {{ARG}} || [[Sierras Pampeanas]] || {{center|<ref name=PolPowell2011_S9>Pol & Powell, 2011, S9</ref>}}
|-
| [[Salamanca Formation]] || {{ARG}} || [[Golfo San Jorge Basin]] || {{center|<ref name=Clyde_p303/>}}
|-
|}

{{clear}}

== Fossils ==
{| class="wikitable sortable"
! Group
! Fossils
! Formation
! class=unsortable | Notes
|-
| rowspan=3 | Mammals || ''[[Etayoa|Etayoa bacatensis]]'' || [[Bogotá Formation|Bogotá]] || {{center|<ref name=FWQuebradaMochuelo>[https://paleobiodb.org/classic/displayCollResults?collection_no=140910 Quebrada Mochuelo] at [[Fossilworks]].org</ref>}}
|-
| ''[[Brandmayria|Brandmayria simpsoni]]'', ''[[Ernestokokenia|Ernestokokenia chaishoer]]'', ''[[Ernestokokenia|E. ?yirunhor]]'', ''[[Isotemnus|Isotemnus cf. primitivus]]'', ''[[Palangania|Palangania brandmayri]]'', ''[[Anisolambda|Anisolambda sp.]]'', ''[[Henricosbornia|Henricosbornia sp.]]'', ''[[Josepholeidya|Josepholeidya sp.]]'', ''[[Notopithecus|Notopithecus sp.]]'', ''[[Othnielmarshia|Othnielmarshia sp.]]'', ''[[Polydolops|Polydolops winecage]]'', ''[[Ricardolydekkeria|Ricardolydekkeria sp.]]'', ''[[Trigonostylops|Trigonostylops sp.]]'', ''[[Victorlemoinea|Victorlemoinea sp.]]'', ''[[Eohyrax|?Eohyrax sp.]]'', ''[[Nemolestes|?Nemolestes sp.]]'', ''[[Notostylops|?Notostylops sp.]]'', ''[[Pleurostylodon|?Pleurostylodon sp.]]'', ''[[Polystylops|?Polystylops sp.]]'', ''[[Postpithecus|?Postpithecus sp.]]'', [[Dasypodidae|Dasypodidae indet.]] || [[Koluel Kaike Formation|Koluel Kaike]] || {{center|<ref name=FWBajoPalangana>[https://paleobiodb.org/classic/displayCollResults?collection_no=52703 Bajo Palangana] at [[Fossilworks]].org</ref><ref name=FWBajoDeLaPalangana>[https://paleobiodb.org/classic/displayCollResults?collection_no=13781 Bajo de la Palangana] at [[Fossilworks]].org</ref> <ref name=FWCerroRedondo>[https://paleobiodb.org/classic/displayCollResults?collection_no=175728 Cerro Redondo] at [[Fossilworks]].org</ref>}}
|-
| ''[[Eoastrapostylops|Eoastrapostylops riolorense]]'', ''[[Notonychops|Notonychops powelli]]'', ''[[Satshatemnus|Satshatemnus bonapartei]]'' || [[Río Loro Formation|Río Loro]] || {{center|<ref name=FWAguasChiquitas>[https://paleobiodb.org/classic/displayCollResults?collection_no=41607 Aguas Chiquitas] at [[Fossilworks]].org</ref>}}
|-
| rowspan=3 | Reptiles & amphibians || [[Testudines|Testudines indet.]] || [[Koluel Kaike Formation|Koluel Kaike]] || {{center|<ref name=FWCerroRedondo/>}}
|-
| ''[[Pelomedusoides|Pelomedusoides sp.]]'' || [[Maíz Gordo Formation|Maíz Gordo]] || {{center|<ref name=FWQuebradaDelPuesto>[https://paleobiodb.org/classic/displayCollResults?collection_no=118480 Quebrada del Puesto] at [[Fossilworks]].org</ref>}}
|-
| ''[[Lorosuchus|Lorosuchus nodosus]]'', ''[[Pelomedusoides|Pelomedusoides cf. argentinensis]]'' || [[Río Loro Formation|Río Loro]] || {{center|<ref name=FWElCadillalLake>[https://paleobiodb.org/classic/displayCollResults?collection_no=58702 El Cadillal Lake] at [[Fossilworks]].org</ref>}}
|-
| Fishes || ''[[Cyprinodon primulus|?Cyprinodon primulus]]'' || [[Maíz Gordo Formation|Maíz Gordo]] || {{center|<ref name=FWSierraSantaBarbaraEast>[https://paleobiodb.org/classic/displayCollResults?collection_no=151867 Sierra Santa Bárbara East] at [[Fossilworks]].org</ref>}}
|-
| Insects || ''[[Anthicus|Anthicus sepultulus]]'', ''[[Austrolibellula|Austrolibellula noroestenia]]'', ''[[Carabites|Carabites harringtoni]]'', ''[[Celinapterix|Celinapterix bellissima]]'', ''[[Cryptophagus|Cryptophagus sunchalensis]]'', ''[[Curculionites|Curculionites harringtoni]]'', ''[[Curculionites|C. jujuyensis]]'', ''[[Curculionites|C. magdalinus]]'', ''[[Curculionites|C. parastictus]]'', ''[[Curculionites|C. stebingeri]]'', ''[[Curculionites|C. sunchalicus]]'', ''[[Curculionites|C. wielandi]]'', ''[[Curviarculia|Curviarculia delicata]]'', ''[[Curviarculia|C. lamasi]]'', ''[[Gryllites|Gryllites vocalis]]'', ''[[Jujusia|Jujusia maizgorda]]'', ''[[Latibasalia|Latibasalia elongata]]'', ''[[Latibasalia|L. quispeae]]'', ''[[Lebia|Lebia harrelli]]'', ''[[Flatidae|Ormenis devincta]]'', ''[[Otiorhynchites|Otiorhynchites aterrimus]]'', ''[[Otiorhynchites|O. crassus]]'', ''[[Palaeomacromia|Palaeomacromia multicellulata]]'', ''[[Palaeophya|Palaeophya argentina]]'', ''[[Promegalestes|Promegalestes singularis]]'', ''[[Tenebrionites|Tenebrionites inclinans]]'', ''[[Thyridates|Thyridates novokschonovi]]'', ''[[Anthonomus|?Anthonomus sunchalensis]]'', ''[[Corizus|?Corizus deflagratus]]'', ''[[Cossonus|?Cossonus devoratus]]'', ''[[Haruspex|?Haruspex defectus]]'', ''[[Molanna|?Molanna derosa]]'', ''[[Podabrus|?Podabrus santaritensis]]'', ''[[Trichodes|?Trichodes stebingeri]]'' || [[Maíz Gordo Formation|Maíz Gordo]] || {{center|<ref name=FWSierraSantaBarbaraEast/><ref name=FWQuebradaElGriton>[https://paleobiodb.org/classic/displayCollResults?collection_no=151868 Quebrada El Gritón] at [[Fossilworks]].org</ref> <ref name=FWLaCuestaAzul>[https://paleobiodb.org/classic/displayCollResults?collection_no=122881 La Cuesta Azul] at [[Fossilworks]].org</ref><ref name=FWElFuerte>[https://paleobiodb.org/classic/displayCollResults?collection_no=106995 El Fuerte] at [[Fossilworks]].org</ref> <ref name=FWLaMendieta>[https://paleobiodb.org/classic/displayCollResults?collection_no=113004 La Mendieta] at [[Fossilworks]].org</ref><ref name=FWElGarabatal>[https://paleobiodb.org/classic/displayCollResults?collection_no=114155 El Garabatal] at [[Fossilworks]].org</ref> <ref name=FWSunchal>[https://paleobiodb.org/classic/displayCollResults?collection_no=151863 Sunchal] at [[Fossilworks]].org</ref><ref name=FWSunchal3>[https://paleobiodb.org/classic/displayCollResults?collection_no=110536 Sunchal Station 3] at [[Fossilworks]].org</ref>}}
|-
| rowspan=4 | Flora || ''[[Banaraphyllum ovatum]]'', ''[[Cissites patagonica]]'', ''[[Cryptocaryoides mariasantisimensis]]'', ''[[Dryophyllum australis]]'', ''[[Fagophyllum duseni]]'', ''[[Laurophyllum chubutensis]]'', ''[[Laurophyllum piatnitzkyi]]'', ''[[Myrica premira]]'', ''[[Nothofagidites visserensis]]'', ''[[Paranymphaea aristolochiaformis]]'', ''[[Sterculia acuminataloba]]'', ''[[Zizyphus chubutensis]]'' || [[Río Chico Formation|Río Chico]] || {{center|<ref name=FWCerroFunes>[https://paleobiodb.org/classic/displayCollResults?collection_no=167857 Cerro Funes] at [[Fossilworks]].org</ref><ref name=FWPuertoVisser3>[https://paleobiodb.org/classic/displayCollResults?collection_no=167879 Puerto Visser] at [[Fossilworks]].org</ref>}}
|-
| ''[[Palmoxylon|Palmoxylon patagonicum]]'' || [[Bororó Formation|Bororó]] || {{center|<ref name=FWPalmoxylon>[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=189486 ''Palmoxylon''] at [[Fossilworks]].org</ref>}}
|-
| ''[[Cordioxylon prototrichotoma]]'' || [[Peñas Coloradas Formation|Peñas Coloradas]] || {{center|<ref name=FWPuVisser>[https://paleobiodb.org/classic/displayCollResults?collection_no=137303 Puerto Visser] at [[Fossilworks]].org</ref>}}
|-
| ''[[Palmoxylon|Palmoxylon patagonicum]]'' || [[Salamanca Formation|Salamanca]] || {{center|<ref name=FWPalmoxylon/>}}
|-
|}

== References ==
{{reflist|3}}

=== Bibliography ===
;Bogotá Formation
* {{citation |last1=Bloch |first1=Jonathan Ivan |author2-link=Edwin Cadena |last2=Cadena |first2=Edwin |last3=Hastings |first3=Alexander |last4=Rincón |first4=Aldo F. |author5-link=Carlos Jaramillo (geologist) |last5=Jaramillo |first5=Carlos |year=2008 |title=Vertebrate faunas from the Paleocene Bogotá Formation of northern Colombia (Abstract) |url=https://www.researchgate.net/publication/267637673 |journal=[[Journal of Vertebrate Paleontology]] |volume=Society of Vertebrate Paleontology, 68th Annual Meeting |pages=_ |accessdate=2017-03-29}}
* {{citation |last=Guerrero Uscátegui |first=Alberto Lobo |year=1992 |title=Geología e Hidrogeología de Santafé de Bogotá y su Sabana |publisher=Sociedad Colombiana de Ingenieros |pages=1–20 }}
* {{citation |last1=Montoya Arenas |first1=Diana María |last2=Reyes Torres |first2=Germán Alfonso |year=2005 |title=Geología de la Sabana de Bogotá |publisher=[[INGEOMINAS]] |pages=1–104 }}

;Bororó Formation
* {{citation |last1=Scarfati |first1=L. |last2=Melendi |first2=D.L. |last3=Volkheimer |first3=W. |year=2009 |title=A Danian subtropical lacustrine palynobiota from South America (Bororó Formation, San Jorge Basin, Patagonia - Argentina) |url=http://revistes.ub.edu/index.php/GEOACTA/article/viewFile/105.000000270/4275 |journal=[[Geologica Acta]] |volume=7 |pages=35–61 |accessdate=2018-09-10}}

;Chota Formation
* {{citation |last=Castro Medina |first=Walter Fidel |year=2010 |title=Geología, informe temático. Proyecto Zonificación Ecológica y Económica del departamento de Amazonas |url=http://iiap.org.pe/Archivos/publicaciones/PUBL521.pdf |publisher=Instituto de Investigaciones de la Amazonía Peruana (IIAP) |pages=1–76 |accessdate=2018-09-04}}
* {{citation |last1=Chacaltana |first1=César |last2=Benites Cañote |first2=Alexandra Lucytania |last3=Valdivia |first3=Waldir |last4=Chumpitaz |first4=Marco |year=2014 |title=La formación Chota en la Cuenca Bagua: Evaluación e implicancias del criterio de clasificación litoestratigráfico |url=https://www.researchgate.net/publication/281715230 |publisher=Congreso Peruano de Geología |pages=1–4 |accessdate=2017-08-15}}

;Las Flores Formation
* {{citation |last1=Raigemborn |first1=María Sol |last2=Krause |first2=Javier M. |last3=Bellosi |first3=Eduardo |last4=Matheos |first4=Sergio D. |year=2010 |title=Redefinición estratigráfica del Grupo Río Chico (Paleógeno inferior), en el norte de la Cuenca del Golfo San Jorge, Chubut |url=http://naturalis.fcnym.unlp.edu.ar/repositorio/_documentos/sipcyt/bfa002591.pdf |journal=[[Revista de la Asociación Geológica Argentina]] |volume=67 |pages=239–256 |accessdate=2017-08-15}}

;Koluel Kaike Formation
* {{citation |last1=Raigemborn |first1=María Sol |last2=Krause |first2=Javier M. |last3=Bellosi |first3=Eduardo |last4=Matheos |first4=Sergio D. |year=2010 |title=Redefinición estratigráfica del Grupo Río Chico (Paleógeno inferior), en el norte de la Cuenca del Golfo San Jorge, Chubut |url=http://naturalis.fcnym.unlp.edu.ar/repositorio/_documentos/sipcyt/bfa002591.pdf |journal=[[Revista de la Asociación Geológica Argentina]] |volume=67 |pages=239–256 |accessdate=2017-08-15}}

;Maíz Gordo Formation
* {{citation |last=Narváez |first=Paula Liliana |year=2009 |title=Palinoestratigrafía, paleoambientes y cambios climáticos durante el Cretácico final y Paleógeno de la Cuenca del Grupo Salta, República Argentina (PhD thesis) |url=http://bdigital.uncu.edu.ar/objetos_digitales/5502/narvaez-tesisd.pdf |publisher=[[National University of Salta|Universidad Nacional de Salta]] |pages=1–229 |accessdate=2017-10-18}}

;Mealla Formation
* {{citation |last1=Sánchez |first1=María Cristina |last2=Marquillas |first2=Rosa A. |year=2010 |title=Facies y ambientes del Grupo Salta (Cretácico-Paleógeno) en Tumbaya, Quebrada de Humahuaca, Provincia de Jujuy |url=http://www.scielo.org.ar/pdf/raga/v67n3/v67n3a07.pdf |journal=[[Revista de la Asociación Geológica Argentina]] |volume=67 |pages=383–391 |accessdate=2018-09-07}}

;Mogollón Formation
* {{citation |last1=Antoine |first1=Pierre-Olivier |last2=Billet |first2=Guillaume |last3=Salas Gismondi |first3=Rodolfo |last4=Tejada Lara |first4=Julia |last5=Baby |first5=Patrice |last6=Brusset |first6=Stéphane |last7=Espurt |first7=Nicolas |year=2015 |title=A New ''Carodnia'' Simpson, 1935 (Mammalia, Xenungulata) from the Early Eocene of Northwestern Peru and a Phylogeny of Xenungulates at Species Level |url=https://www.researchgate.net/publication/267271471 |journal=[[Journal of Mammalian Evolution]] |volume=22 |issue=2 |pages=129–140 |doi=10.1007/s10914-014-9278-1 |accessdate=2019-02-13}}
* {{citation |last=Quispe Alcalá |first=David Ricardo |year=2010 |title=Evaluación Geológica de la Formación Mogollón en el Yacimiento Leones – Cuenca Talara (MSc. thesis) |url=http://cybertesis.uni.edu.pe/bitstream/uni/109/1/quispe_ad.pdf |publisher=[[National University of Engineering|Universidad Nacional de Ingeniería]] |pages=1–87 |accessdate=2017-10-18}}

;Muñani Formation
* {{citation |last1=Gelfo |first1=Javier N. |last2=Sigé |first2=Bernard |year=2011 |title=A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru |url=http://www.app.pan.pl/archive/published/app56/app20100067.pdf |journal=[[Acta Palaeontologica Polonica]] |volume=56 |issue=4 |pages=665–678 |doi=10.4202/app.2010.0067 |accessdate=2017-08-15}}

;Peñas Coloradas Formation
* {{citation |last1=Clyde |first1=William C. |last2=Wilf |first2=Peter |last3=Iglesias |first3=Ari |last4=Slingerland |first4=Rudy L. |last5=Bijl |first5=Peter K. |last6=Bralower |first6=Timothy J. |last7=Brinkhuis |first7=Henk |last8=Comer |first8=Emily |last9=Huber, Mauricio Ibañez Mejia, Brian R. Jicha, J. Marcelo Krause, Jonathan D. Schueth, Bradley S. Singer, María Sol Raigemborn, Mark D. Schmitz, Appy Sluijs, and María del Carmen Zamaloa |first9=Brian T. |year=2014 |title=New age constraints for the Salamanca Formation and lower Río Chico Group in the western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene extinction recovery and land mammal age correlations |url=https://ceps.unh.edu/sites/ceps.unh.edu/files/departments/earth_sciences/clyde_et_al._2014.pdf |journal=[[GSA Bulletin]] |volume=126 |issue=3–4 |pages=289–306 |doi=10.1130/B30915.1 |bibcode=2014GSAB..126..289C |accessdate=2017-08-15}}
* {{citation |last1=Raigemborn |first1=María Sol |last2=Krause |first2=Javier M. |last3=Bellosi |first3=Eduardo |last4=Matheos |first4=Sergio D. |year=2010 |title=Redefinición estratigráfica del Grupo Río Chico (Paleógeno inferior), en el norte de la Cuenca del Golfo San Jorge, Chubut |url=http://naturalis.fcnym.unlp.edu.ar/repositorio/_documentos/sipcyt/bfa002591.pdf |journal=[[Revista de la Asociación Geológica Argentina]] |volume=67 |pages=239–256 |accessdate=2017-08-15}}

;Río Loro Formation
* {{citation |last1=Pol |first1=Diego |last2=Powell |first2=Jaime E. |year=2011 |title=A new sebecid mesoeucrocodylian from the Rio Loro Formation (Palaeocene) of north-western Argentina |journal=[[Zoological Journal of the Linnean Society]] |volume=163 |pages=S7–S36|doi=10.1111/j.1096-3642.2011.00714.x |hdl=11336/69518 |hdl-access=free }}

;Salamanca Formation
* {{citation |last1=Apesteguia |first1=Sebastián |last2=Gómez |first2=Raúl O. |last3=Rougier |first3=Guillermo W. |year=2014 |title=The youngest South American rhynchocephalian, a survivor of the K/Pg extinction |url=https://www.researchgate.net/publication/264897519 |journal=Proceedings of the Royal Society B: Biological Sciences |volume=281 |issue=1792 |pages=20140811 |doi=10.1098/rspb.2014.0811 |pmid=25143041 |pmc=4150314 |accessdate=2019-03-03}}
* {{citation |last1=Bonaparte |first1=J.F. |last2=Morales |first2=J. |year=1997 |title=Un primitico Notonychopidae (Litopterna) del paleoceno inferior de Punta Peligro, Chubut, Argentina |url=https://core.ac.uk/download/pdf/36033643.pdf |journal=Estudios Geológicos |volume=53 |issue=5–6 |pages=263–274 |doi=10.3989/egeol.97535-6232 |accessdate=2018-10-01}}
* {{citation |last1=Clyde |first1=William C. |last2=Wilf |first2=Peter |last3=Iglesias |first3=Ari |last4=Slingerland |first4=Rudy L. |last5=Barnum |first5=Timothy |last6=Bijl |first6=Peter K. |last7=Bralower |first7=Timothy J. |last8=Brinkhuis |first8=Henk |last9=Comer, Brian T. Huber, Mauricio Ibañez Mejia, Brian R. Jicha, J. Marcelo Krause, Jonathan D. Schueth, Bradley S. Singer, María Sol Raigemborn, Mark D. Schmitz, Appy Sluijs, María del Carmen Zamaloa |first9=Emily E. |year=2014 |title=New age constraints for the Salamanca Formation and lower Río Chico Group in the western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene extinction recovery and land mammal age correlations |url=https://ceps.unh.edu/sites/ceps.unh.edu/files/departments/earth_sciences/clyde_et_al._2014.pdf |journal=[[GSA Bulletin]] |volume=126 |issue=3–4 |pages=289–306 |doi=10.1130/B30915.1 |bibcode=2014GSAB..126..289C |accessdate=2017-08-15}}
* {{citation |last1=Jud |first1=Nathan A. |last2=Gandolfo |first2=Maria A. |last3=Iglesias |first3=Ari |last4=Wilf |first4=Peter |year=2017 |title=Flowering after disaster: Early Danian buckthorn (Rhamnaceae) flowers and leaves from Patagonia |journal=[[PLOS ONE]] |volume=12 |issue=5 |pages=e0176164 |doi=10.1371/journal.pone.0176164 |doi-access=free |pmid=28489895 |pmc=5425202 |bibcode=2017PLoSO..1276164J }}
* {{citation |last1=Ruiz |first1=Daniela P. |last2=Brea |first2=Mariana |last3=Raigemborn |first3=M. Sol |last4=Matheos |first4=Sergio D. |year=2017 |title=Conifer woods from the Salamanca Formation (early Paleocene), Central Patagonia, Argentina: Paleoenvironmental implications |url=https://www.researchgate.net/publication/316173102 |journal=[[Journal of South American Earth Sciences]] |volume=76 |pages=427–445 |doi=10.1016/j.jsames.2017.04.006 |bibcode=2017JSAES..76..427R |hdl=11336/41178 |accessdate=2019-02-14|hdl-access=free }}

{{SALMA}}

[[Category:Riochican| ]]
[[Category:Paleocene South America]]
[[Category:Eocene South America]]
[[Category:Paleogene Argentina]]

Riochican - Revision history

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