Continental Vertebrates During the Marine Isotope Stage 3 (MIS 3) in Argentina

GASPARINI, GERMÁN MARIANO; SOIBELZON, ESTEBAN; DESCHAMPS, CECILIA; FRANCIA, ANALÍA; BEILINSON, ELISA; SOIBELZON, LEOPOLDO HÉCTOR; TONNI, EDUARDO PEDRO

Springer Earth System Sciences

Springer Earth System Sciences

Año: 2016 p. 227 - 247

2197-9596

Paleontological sites in Argentina with continental vertebrates correspondingto the Marine Isotope Stage 3 (MIS 3) interval are scarce or poorly known.This situation is mainly due to the lack of absolute ages for Pleistocene fossil remainsor their bearing sediments that would allow the verification of the chronologyestablished for this interval. However, a few isolated evidences show that continentalvertebrates responded to the abrupt temperature changes that characterized the MIS 3(Heinrich colder events and Dansgaard?Oeschger warmer events). Up to date, continentalvertebrate remains of this age have been found mainly in Buenos Airesprovince, but also in a few sites of northeastern Argentina (such as Entre Ríos,Corrientes, Formosa and Chaco provinces). In Buenos Aires province: (1) Paso Otero,in the Río Quequén Grande valley, evidence of warmer and more humid conditionswere found in sediments dated in 37,800 ± 2300 radiocarbon years before present(RCYBP); (2) Mar del Sur, General Alvarado County, coastal marine sediments withcontinental mammals were dated in 25,700 ± 800 and 33,780 ± 1200 RCYBP;(3) Balneario Saldungaray, in the Río Sauce Grande valley, Tornquist County,