The Marplatan age ('Uquian') is a period of geologic time (3.3–2 Ma) in both the Pliocene and Pleistocene epochs, used specifically within the South American Land Mammal Ages.
Chronology
[edit]The Marplatan age follows the Chapadmalalan and precedes the Ensenadan age.[1] The source localities for all three subages (Barranca de los Lobos Formation, Vorohué Formation, San Andrés Formation) come from near Mar del Plata, Buenos Aires Province, Argentina.
Barrancalobian
[edit]The Barrancalobian is the first subage of the Marplatan, and is characterized by the Platygonus scagliai biozone.[2] A possible cosmic impact occurred at the start of the Marplatan (3.3Ma) in Argentina.[3]
Vorohuen
[edit]The Vorohuen subage contains the Akodon (Akodon) lorenzinii biozone.[2]
Sanandresian
[edit]The Sanandresian subage concludes the Marplatan, and coincides with the Ctenomys chapalmalensis ('Paractenomys chapadmalensis') biozone.[2] A broadly cold and arid climate began in the Sanandresian, which persisted into the Ensenadan age.[4]
References
[edit]- ^ Carrillo, Juan D.; Forasiepi, Analía; Jaramillo, Carlos; Sánchez-Villagra, Marcelo R. (2014). "Neotropical mammal diversity and the Great American Biotic Interchange: spatial and temporal variation in South America's fossil record". Frontiers in Genetics. 5: 451. doi:10.3389/fgene.2014.00451. ISSN 1664-8021. PMC 4283609. PMID 25601879.
- ^ a b c Cione, Alberto Luis (2015). The Great American Biotic Interchange: A South American Perspective. SpringerBriefs in Earth System Sciences Ser. Germán Mariano Gasparini, Esteban Soibelzon, Leopoldo Héctor Soibelzon, Eduardo Pedro Tonni. Dordrecht: Springer Netherlands. ISBN 978-94-017-9791-7.
- ^ Schultz, P. H.; Zarate, M.; Hames, W.; Camilion, C.; King, J. (1998-12-11). "A 3.3-Ma impact in argentina and possible consequences". Science. 282 (5396): 2061–2063. doi:10.1126/science.282.5396.2061. ISSN 1095-9203. PMID 9851923.
- ^ Zurita, Alfredo E.; Carlini, Alfredo A.; Scillato-Yané, Gustavo J. (2009-12-01). "Paleobiogeography, biostratigraphy and systematics of the Hoplophorini (Xenarthra, Glyptodontoidea, Hoplophorinae) from the Ensenadan Stage (early Pleistocene to early-middle Pleistocene)". Quaternary International. The Ensenadan Stage/Age in southern South America. 210 (1): 82–92. doi:10.1016/j.quaint.2009.06.029. ISSN 1040-6182.
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