Paleontología y cronología del Cuaternario de las provincias de Corrientes y Formosa, Argentina

ZURITA, A.E.; MIÑO BOILINI, A. R.; FRANCIA A.; ERRA, G.; ALCARAZ, M.A.; CARILINI, A.A.; LUTZ, A.L.; FRIEDRICH, J

Acta Geologica Lilloana

UNT e Instituto Miguel Lillo

Lugar: San Miguel de Tucumán; Año: 2014 vol. 26 p. 75 - 86

0567-7513

In the last years, an important improvement on the paleontological knowledge from the Corrientes and Formosa provinces (Argentina) has been observed. This included the exhumation of numerous fossils specimen, most of them with strict stratigraphic and geographic control, and new absolute dating (C14 and OSL). In the Corrientes province, the Pleistocene is represented by the Toropí and Yupoí formations. At Arroyo Toropí, OSL dating suggest an Upper Pleistocene age for these units.. Until now the palaeofauna recovered is mostly composed of mammalian, but including also a few reptiles.  This association is formed mainly by pampean taxa; however, some intertropical taxa have been detected. In turn, in the Formosa province, the new collections come from the Río Bermejo Formation. OSL and C14   dating carried out in the locality of Villa Escolar suggests an Upper Pleistocene-Lower Holocene age for this unit.  As in Corrientes province, most of the palaeofauna belongs to mammalian, but including a few fish and reptiles. All the recognized taxa in Formosa province (except the Pampatheriidae Holmesina paulacoutoi) suggest the presence of arid/semiarid and cool environments. The improvement of the knowledge of these paleofaunistic associations is a key factor, because it allows making more accurate comparisons with other regions of South America.