Hostname: page-component-77f85d65b8-7lfxl Total loading time: 0 Render date: 2026-04-18T00:40:16.721Z Has data issue: false hasContentIssue false

Did the Megafauna Range to 4300 BP in South America?

Published online by Cambridge University Press:  18 July 2016

Alberto L Cione
Affiliation:
Departamento Científico Paleontología Vertebrados, Facultad de Ciencias Naturales y Museo, 1900 La Plata, Argentina. Email: acione@museo.fcnym.unlp.edu.ar; eptonni@museo.fcnym.unlp.edu.ar.
Aníbal J Figini
Affiliation:
LATYR-CIG Facultad de Ciencias Naturales y Museo, 1900 La Plata, Argentina
Eduardo P Tonni
Affiliation:
Departamento Científico Paleontología Vertebrados, Facultad de Ciencias Naturales y Museo, 1900 La Plata, Argentina. Email: acione@museo.fcnym.unlp.edu.ar; eptonni@museo.fcnym.unlp.edu.ar.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

A date of 4300 ± 90 BP for extinct megafauna in Argentina is discussed. The fossil remains come from the Guerrero Member (area) of the Luján Formation near the city of Luján, Buenos Aires Province. The age of the top of the Guerrero Member is constrained by more than 60 radiocarbon dates obtained from the overlying Río Salado Member of Luján Formation, Las Escobas Formation, and Puesto Callejón Viejo Soil, most of them older than 4300 BP. In view of its low collagen content, the 14C measurement of bone sample from Luján should not be accepted uncritically. Because of the poor bone preservation and the possible introduction of “young” contaminants that were not completely eliminated, the 14C date of 4300 ± 90 BP is not reliable. Both biostratigraphic and 14C dating evidence indicates that the date of 4300 BP for the last representative of extinct megafauna in South America is unsupported.

Information

Type
Articles
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona