Lower Cretaceous calcareous nannoplankton from the Neuquén Basin, Argentina

New constraints on the Jurassic–Cretaceous boundary in the High Andes using high-precision U–Pb data

“…The Mesozoic stratigraphy has been established through a series of classic studies, beginning in the 19th century, and numerous subsequent contributions that made the Neuquén Basin one of the best known Andean basins of South America (see Gulisano et al, 1984;Uliana, 1991, 1999;Veiga et al, 2005). The abundant and well preserved fossils are the subject of many monographs and important studies on its invertebrate fauna and flora (Riccardi, 1988(Riccardi, , 1991Aguirre-Urreta and Rawson, 1997;Bown and Concheyro, 2004;Aguirre-Urreta et al, 2005.…”

“…Besides, recent studies on calcareous nannofossils in the Neuquén Basin (Scasso and Concheyro, 1999;Ballent et al, 2004;Bown and Concheyro, 2004;Concheyro et al, 2007;Kietzmann et al, 2011) allow correlations with several proposed biozonations in the northern hemisphere (Bralower et al, 1989;Casellato, 2010;Wimbledon et al, 2011).…”

Astrochronology of the Valanginian–Hauterivian stages (Early Cretaceous): Chronological relationships between the Paraná–Etendeka large igneous province and the Weissert and the Faraoni events

“…The case of the Valanginian and Hauterivian stages is particularly representative. A SHRIMP U-Pb age from a tuff level in the Neuquén Basin (Argentina) was stratigraphically positioned by calcareous nannofossils and δ 13 C to the mid-Hauterivian and provided an age of -132.5 ± 1.3 Ma (Aguirre-Urreta et al, 2008a;Aguirre-Urreta et al, 2008b;Bown and Concheyro, 2004). This age was recently reevaluated at -129.09 ± 0.16 Ma using a more accurate CA-ID-TIMS U-Pb dating (Aguirre-Urreta et al, 2015).…”

First U–Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina

“…Our studies were focused in the Lower Cretaceous marine succession spanning the Berriasian to the Lower Barremian based on a detailed ammonoid biostratigraphy achieved by Aguirre-Urreta and Rawson (1997). Further work on ammonoids combined with nannoplankton and palynology has not only improved the biostratigraphic understanding of the Lower Cretaceous of the basin but also provided a very good correlation scheme with the Tethyan standard zonation (Aguirre-Urreta et al, 1999Bown and Concheyro, 2004).…”