Marplatan

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

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

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

The Vorohuen subage contains the Akodon (Akodon) lorenzinii biozone.[2] The first canids (Dusicyon) and mustelids (Galictis) of South America appear in Vorohuen-age sediments of the Pampas.[4][5]

Sanandresian

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.[6]

References

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ Prevosti, Francisco J.; RincóN, Ascanio D. (September 2007). "A NEW FOSSIL CANID ASSEMBLAGE FROM THE LATE PLEISTOCENE OF NORTHERN SOUTH AMERICA: THE CANIDS OF THE INCIARTE ASPHALT PIT (ZULIA, VENEZUELA), FOSSIL RECORD AND BIOGEOGRAPHY". Journal of Paleontology. 81 (5): 1053–1065. doi:10.1666/pleo05-143.1. ISSN 0022-3360.
  5. ^ Zamorano, Martín; Soibelzon, Esteban; Tonni, Eduardo P. (2021-10-28). "Giants of the Pampean plains (Argentina) during Early Pleistocene (Ensenadan). The case of Panochthus (Xenarthra, Glyptodontidae): comparative descriptions". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen: 35–51. doi:10.1127/njgpa/2021/1017.
  6. ^ 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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