Friasian

The Friasian age is a period of geologic time (16.3–15.5 Ma) within the Early Miocene epoch of the Neogene, used more specifically within the SALMA classification of South America. It follows the Santacrucian and precedes the Colloncuran age.

Etymology

The age is named after the Río Frías Formation in the Aysén Basin, Patagonia, Chile.

Formations

Locations of Friasian formations

Formation bold is type	Country	Basin	Notes
Río Frías Formation	Chile	Aysén Basin
Castilletes Formation	Colombia	Cocinetas Basin
Cerdas Beds	Bolivia	Altiplano Basin
Chilcatay Formation	Peru	Pisco Basin
Cura-Mallín Group	Chile	Cura-Mallín Basin
Gran Bajo del Gualicho Formation	Argentina	Colorado Basin
Parángula Formation	Venezuela	Barinas-Apure Basin
Pebas Formation	Brazil Colombia Ecuador Peru	Amazon Basin
Río Foyel Formation	Argentina	Patagonian Andes
Río Yuca Formation	Venezuela	Barinas-Apure Basin

Fossils

Group	Fossils	Formation	Notes
Mammals	Abderites aisenense, A. meridionalis, Alloiomys friasensis, Astrapotherium hesperinum, Borhyaena tuberata, Cladosictis patagonica, Megathericulus friasensis, Microbiotherium tehuelchum, Parabderites bicrispatus, Palaeothentes intermedius, P. lemoinei, P. minutus, Pichipilus halleuxi, Pitheculites rothi, Prothylacinus patagonicus, Prototrigodon rothi, Sipalocyon gracilis, Adinotherium sp., Homalodotherium sp., Neonematherium sp., Nesodon sp., Pachyrukhos sp., Phoenixauchenia sp., ?Propalaehoplophorus sp., Protypotherium sp., Prozaedyus sp., Theosodon sp., Trachytypotherium sp., Platyrrhini indet.	Río Frías
	Lycopsis padillai, ?Hyperleptus sp., Astrapotheriidae, Odontoceti, Mysticeti, Glyptodontidae, Pampatheriidae, Macraucheniidae, Proterotheriidae, Leontinidae, Toxodontidae, Interatheriidae, Megatheriidae, Dinomyidae, Sirenia, Sparassodonta	Castilletes
	Hegetotherium cerdasensis, Juchuysillu arenalesensis, Llullataruca cf. shockeyi, Microtypotherium cf. choquecotense, Protypotherium cf. attenuatum, "Plesiotypotherium" minus, Palyeidodon obtusum, Mcdonaldocnus bondesioi, Borhyaenoidea indet., Euphractini indet., Lagostominae indet., Macraucheniidae indet., Megatheriinae indet., Mesotheriinae indet., Peltephilidae indet., Uruguaytheriinae indet.	Cerdas
	Adinotherium sp., Peltephilidae indet.	Río Yuca
Reptiles	Chelus colombiana, Chelonoidis sp., cf. Crocodylus sp., cf. Mourasuchus sp., cf. Purussaurus sp., Alligatoridae indet., Boidae indet., Eusuchia indet., Gavialoidea indet., Podocnemididae indet.	Castilletes
	Barinasuchus arveloi	Parángula
	Purussaurus sp.	Río Yuca
Birds	Aves indet.	Castilletes
	Palaeospheniscus bergi, Spheniscidae indet.	Río Foyel
Fish	Megalodon, Characidae, Serrasalmidae, Sciaenidae, Sparidae, Sphyraenidae, Ariidae, Callichthyidae, Doradidae, Pimelodidae, Carcharhinidae, Hemigaleidae, Sphyrnidae, Lamnidae, Otodontidae, Dasyatidae, Myliobatidae, Rhinopteridae, Ginglymostomatidae, Pristiophoridae, Pristidae, Rhynchobatidae, Rhynobatidae, Lepidosirenidae	Castilletes
	Carcharodon hastalis	Río Foyel
	Phractocephalus sp., Platysilurus sp.	Río Yuca

References

Bibliography

Río Frías Formation

• Abello, María Alejandra; Rubilar Rogers, David (2012), "Revisión del género Abderites Ameghino, 1887 (Marsupialia, Paucituberculata)", Ameghiniana, 49 (2): 164–184, Bibcode:2012Amegh..49..164A, doi:10.5710/AMGH.v49i2(408), retrieved 2019-02-15
• Bellosi, Eduardo S. (2014), Ambientes asociados a la fauna Friasense (Mioceno Medio) en Alto río Cisnes (Aysén, Chile), XIV Reuñión Argentina de Sedimentología, pp. 40–41, retrieved 2018-09-10
• Bostelmann, J.E. (2012), The Alto Río Cisnes Fossil Fauna (Río Frías Formation, Early-Middle Miocene, Friasian SALMA): A keystone and paradigmatic vertebrate assemblage of the South American Fossil Record, III Simposio Paleontología en Chile, pp. 44–45, retrieved 2018-09-10
• Marshall, Larry G. (1990), "Fossil Marsupialia from the type Friasian land mammal age (Miocene), Alto Río Cisnes, Aisén, Chile", Revista Geológica de Chile, 17: 19–55, retrieved 2017-10-21
• Marshall, Larry G.; Salinas, Patricia (1990), "Stratigraphy of the Río Frías Formation (Miocene) along the Alto Río Cisnes, Aisén, Chile", Revista Geológica de Chile, 17: 57–87, archived from the original on May 21, 2018, retrieved 2017-10-21

Castilletes Formation

• Amson, Eli; Carrillo, Juan D.; Jaramillo, Carlos (2016), "Neogene sloth assemblages (Mammalia, Pilosa) of the Cocinetas Basin (La Guajira, Colombia): Implications for the Great American Biotic Interchange" (PDF), Palaeontology: 1–20, retrieved 2017-03-31
• Cadena, Edwin; Jaramillo, Carlos (2015), "Early to middle Miocene turtles from the northernmost tip of South America: giant testudinids, chelids, and podocnemidids from the Castilletes Formation, Colombia" (PDF), Ameghiniana, 52 (2): 188–203, Bibcode:2015Amegh..52..188C, doi:10.5710/AMGH.10.11.2014.2835, retrieved 2017-08-08
• Carrillo, Juan D.; Amson, Eli; Jaramillo, Carlos; Sánchez, Rodolfo; Quiroz, Luis; Cuartas, Carlos; Rincón, Aldo F.; Sánchez Villagra, Marcelo R. (2018), "The Neogene record of northern South American native ungulates", Smithsonian Contributions to Paleobiology, 101: 1–67, retrieved 2019-02-11
• Carrillo Briceño, Jorge D.; Argyriou, Thodoris; Zapata, Vladimir; Kindlimann, René; Jaramillo, Carlos (2016), "A New Early Miocene (Aquitanian) Elasmobranchii Assemblage from the la Guajira Peninsula, Colombia" (PDF), Ameghiniana, 53 (2): 77–99, Bibcode:2016Amegh..53...77C, doi:10.5710/AMGH.26.10.2015.2931, retrieved 2017-08-08
• Hendy, Austin J.W.; Jones, Douglas S.; Moreno, Federico; Zapata, Vladimir; Jaramillo, Carlos (2015), "Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia" (PDF), Swiss Journal of Palaeontology, 134 (1): 45–75, Bibcode:2015SwJP..134...45H, doi:10.1007/s13358-015-0074-1, retrieved 2017-08-08
• Moreno, F.; Hendy, A.J.W.; Quiroz, L.; Hoyos, N.; Jones, D.S.; Zapata, V.; Zapata, S.; Ballen, G.A.; Cadena, A.L. Cárdenas, J.D. Carrillo Briceño, J.D. Carrillo, D. Delgado Sierra, J. Escobar, J.I. Martínez, C. Martínez, C. Montes, J. Moreno, N. Pérez, R. Sánchez, C. Suárez, M.C. Vallejo Pareja, C. Jaramillo, Edwin (2015), "Revised stratigraphy of Neogene strata in the Cocinetas Basin, La Guajira, Colombia" (PDF), Swiss Journal of Palaeontology, 134 (1): 5–43, Bibcode:2015SwJP..134....5M, doi:10.1007/s13358-015-0071-4, retrieved 2017-08-08{{citation}}: CS1 maint: multiple names: authors list (link)
• Moreno Bernal, Jorge W (2014), Fossil Crocodilians from the High Guajira Peninsula of Colombia, and the History of Neogene Crocodilian Diversity in Tropical South America, University of Nebraska–Lincoln, pp. 1–66, retrieved 2017-08-08
• Suárez, Catalina; Forasiepi, AnalÍa M.; Goin, Francisco J.; Jaramillo, Carlos (2015), "Insights into the Neotropics Prior to the Great American Biotic Interchange: new evidence of mammalian predators from the Miocene of Northern Colombia" (PDF), Journal of Vertebrate Paleontology, 36 (1) e1029581, doi:10.1080/02724634.2015.1029581, hdl:11336/53653, retrieved 2019-02-13

Cerdas Beds

• Croft, Darin A.; Carlini, Alfredo A.; Ciancio, Martín R.; Brandoni, Diego; Drew, Nicholas E.; Engelman, Russell K.; Anaya, Federico (2016), "New mammal faunal data from Cerdas, Bolivia, a middle-latitude Neotropical site that chronicles the end of the Middle Miocene Climatic Optimum in South America", Journal of Vertebrate Paleontology, 36 (5) e1163574, Bibcode:2016JVPal..36E3574C, doi:10.1080/02724634.2016.1163574, hdl:11336/49745, retrieved 2019-02-12

Chilcatay Formation

• Bianucci, Giovanni; Bosio, Giulia; Malinverno, Elisa; De Muizon, Christian; Villa, Igor M.; Urbina, Mario; Lambert, Olivier (2018), "A new large squalodelphinid (Cetacea, Odontoceti) from Peru sheds light on the Early Miocene platanistoid disparity and ecology", Royal Society Open Science, 5 (4) 172302, Bibcode:2018RSOS....572302B, doi:10.1098/rsos.172302, PMC 5936943, PMID 29765678
• De la Cruz, Aldo Alván (2008), "Geología de Ocucaje: aportes en la sedimentología y paleontología de Lomas de Ullujaya (Ica, Perú)" (PDF), Revista del Instituto de Investigaciones FIGMMG, 11: 51–59, retrieved 2017-08-15
• Lambert, Olivier; De Muizon, Christian; Malinverno, Elisa; Di Celma, Claudio; Urbina, Mario; Bianucci, Giovanni (2017), "A new odontocete (toothed cetacean) from the Early Miocene of Peru expands the morphological disparity of extinct heterodont dolphins", Journal of Systematic Palaeontology, 16 (12): 981–1016, doi:10.1080/14772019.2017.1359689, hdl:11568/891482, retrieved 2019-02-12
• Lambert, Olivier; Bianucci, Giovanni; Urbina, Mario (2014), "Huaridelphis raimondii, a new early Miocene Squalodelphinidae (Cetacea, Odontoceti) from the Chilcatay Formation, Peru", Journal of Vertebrate Paleontology, 34 (5): 987–1004, Bibcode:2014JVPal..34..987L, doi:10.1080/02724634.2014.858050, retrieved 2019-02-12

Cura-Mallín Group

• Flynn, John J.; Charrier, Reynaldo; Croft, Darin A.; Gans, Phillip B.; Herriott, Trystan M.; Wertheim, Jill A.; Wyss, André R. (2008), "Chronologic implications of new Miocene mammals from the Cura-Mallín and Trapa Trapa formations, Laguna del Laja area, south central Chile" (PDF), Journal of South American Earth Sciences, 26 (4): 412–423, Bibcode:2008JSAES..26..412F, doi:10.1016/j.jsames.2008.05.006, retrieved 2017-10-20
• Shockey, Bruce J.; Flynn, John J.; Croft, Darin A.; Gans, Phillip; Wyss, André R. (2012), "New leontiniid Notoungulata (Mammalia) from Chile and Argentina: comparative anatomy, character analysis, and phylogenetic hypotheses", American Museum Novitates (3737): 1–64, doi:10.1206/3737.2, retrieved 2019-02-15
• Utgé, Silvana; Folguera, Andrés; Litvak, Vanesa; Ramos, Víctor A. (2009), "Geología del sector norte de la Cuenca de Cura Mallín en las Lagunas de Epulaufquen, Neuquén", Revista de la Asociación Geológica Argentina, 64 (2): 231–248, retrieved 2017-10-01

Gran Bajo del Gualicho Formation

• Reichler, Valeria A (2010), "Estratigrafía y paleontología del Cenozoico marino del Gran Bajo y Salinas del Gualicho, Argentina, y descripción de 17 especies nuevas" (PDF), Andean Geology, 31: 177–219, retrieved 2018-09-11

Parángula Formation

• Paolillo, Alfredo; Linares, Omar J. (2007), "Nuevos cocodrilos Sebecosuchia del Cenozoico suramericano (Mesosuchia: Crocodylia)" (PDF), Paleobiología Neotropical, 03: 1–25, retrieved 2017-08-15

Pebas Formation

• Salas Gismondi, Rodolfo; Flynn, John J.; Baby, Patrice; Tejada Lara, Julia V.; Wesselingh, Frank P.; Antoine, Pierre-Olivier (2015), "A Miocene hyperdiverse crocodylian community reveals peculiar trophic dynamics in proto-Amazonian mega-wetlands", Proceedings of the Royal Society B: Biological Sciences, 282 (1804) 20142490, doi:10.1098/rspb.2014.2490, PMC 4375856, PMID 25716785, retrieved 2019-02-13
• Wesselingh, F.P.; Hoorn, M.C.; Guerrero, J.; Räsänen, M.E.; Romero Pittmann, L.; Salo, J. (2006), "The stratigraphy and regional structure of Miocene deposits in western Amazonia (Peru, Colombia and Brazil), with implications for late Neogene landscape evolution", Scripta Geologica, 133: 291–322, retrieved 2017-08-15

Río Foyel Formation

• Acosta Hospitaleche, Carolina; Griffin, Miguel; Asensio, Marcos; Cione, Alberto Luis; Tambussi, Claudia (2013), "Middle Cenozoic penguin remains from the Patagonian Cordillera" (PDF), Andean Geology, 40: 490–503, retrieved 2017-10-26
• Encinas, Alfonso; Folguera, Andrés; Bechis, Florencia; Finger, Kenneth L.; Zambrano, Patricio; Pérez, Felipe; Benarbé, Pablo; Tapia, Francisca; Riffo and Luis Buatois, Darío Orts, Sven N. Nielsen, Victor V. Valencia, José Cituño, Verónica Oliveros, Lizet de Girolamo Del Mauro and Víctor Alberto Ramos, Ricardo (2018), Folguera, A., Contreras Reyes, E., Heredia, N., Encinas, A., B. Iannelli, S., Oliveros, V., M. Dávila, F., Collo, G., Giambiagi, L., Maksymowicz, A., Iglesia Llanos, M.P., Turienzo, M., Naipauer, M., Orts, D., D. Litvak, V., Alvarez, O., Arriagada, C. (ed.), The Late Oligocene–Early Miocene Marine Transgression of Patagonia in The Evolution of the Chilean-Argentinean Andes, Springer, pp. 443–474, ISBN 978-3-319-67774-3, retrieved 2018-09-11{{citation}}: CS1 maint: multiple names: authors list (link)

Río Yuca Formation

• Rincón, Ascanio D.; Solórzano, Andrés; Macsotay, Oliver; McDonald, H. Gregory; Nüñez Flores, Mónica (2016), "A new Miocene vertebrate assemblage from the Río Yuca Formation (Venezuela) and the northernmost record of typical Miocene mammals of high latitude (Patagonian) affinities in South America", Geobios, 757 (5): 1–35, Bibcode:2016Geobi..49..395R, doi:10.1016/j.geobios.2016.06.005, retrieved 2019-02-12