Evidence for early Pliocene and late Miocene transgressions in southern Patagonia (Argentina): 87Sr/86Sr ages of the pectinid "Chlamys" actinodes (Sowerby)

• Main Authors: Del Río, C. J., Griffin, Miguel, McArthur, J. M., Martínez, S., Thirlwall, M.F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2013
• Subjects: Geología; Ciencias Naturales; 87Sr/86Sr; Argentina; Early Pliocene; Late Miocene; Patagonia; Tortonian; Zanclean; Tortoniano; Zancliense; Austral; Cockburn; Antarc*; Antarctica
• Online Access: http://sedici.unlp.edu.ar/handle/10915/85476

Numerical ages based on 87Sr/86Sr dating of calcitic shells belonging to the pectinid "Chlamys" actinodes (Sowerby) document the only late Miocene (Tortonian) sea flooding event in the Austral Basin at Cabo Buentiempo (8.95±0.82Ma, 2 s.e.), and provide evidence of the first documented earl...