02037nmc a2200253 4500 20260520010330.0 260224s xxu CD I116 64 0015469 Bioestratigrafía y geocronología de alta resolución de la Formación Vaca Muerta, Cuenca Neuquina 20/10/2016 ; 20/10/2016 24 p. High Resolution Biostratigraphy and Geochronology of the Vaca Muerta Formation, Neuquén Basin In this work we present new results from studies of ammonites and calcareous nannofossils in selected surface sections of the Vaca Muerta Formation that have yielded a precise biochronology on this unit. Furthermore, these studies have been correlated with the classical biozonations of the Tethys in the case of the ammonites and have also adjusted events of calcareous nannofossils recognized in the Neuquén Basin with those of the Tethys. Geochronological U-Pb dating performed at both the Vaca Muerta and the underlying Tordillo Formation has provided absolute ages of both lithostratigraphic units. These data contrast markedly with the currently accepted ages for this interval by the International Commission on Stratigraphy (ICS) and the Geological Time Scales (GTS 2012) and are about 5 million years younger. Finally, we stress the importance and need for detailed biostratigraphic studies that detect tectonic disturbances showing as an example the classical locality of La Yesera in northern Neuquén. CONGTP Aguirre-Urreta, Beatriz 55684 Vennari, Verónica V. 55685 Lescano, Marina 55686 Naipauer, Maximiliano 55687 Concheyro, Andrea 55688 Ramos, Víctor A. 953 Congreso de Exploración y Desarrollo de Hidrocarburos (9no. : 2014 nov. 3-7 : Mendoza) 54287 189770 189770 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/CONEXPLOR2014/245-Bioestratigrafiaygeocronologia.pdf 0 0 0 0 257589 BAAB BAAB CD I116 64 0015469 2026-03-06 200062015 0 CD I116 64 0015469 200062015 2026-03-06 00:19:54 2026-03-06 ARCHIVO