IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Preliminary Paleoenvironmental Interpretation of the 11,500?4000 BP span from Cruces Core 1, Dry Puna of Jujuy, Argentina: The Diatom and C (TOC and TIC) Content Records
Autor/es:
MALENA PIROLA; SABRINA BUSTOS; MARCELO MORALES
Lugar:
Tunuyán
Reunión:
Congreso; 4th Southern Deserts Conference; 2014
Institución organizadora:
Universidad Nacional de Cuyo, Laboratorio de Paleo-Ecología Humana
Resumen:
Fifteen years ago, our research team started to carry out multi-proxy analysis in several sedimentary records from the Tropical Andes Highlands of Jujuy with different chronologies. These studies have furthered our knowledge about paleoenvironmental conditions and their variability over the last 13 Kyrs at different time-space scales. Most of these studies were framed in a broader paleoecological research agenda focused on disentangling the complex nature of the relationship between environment and human population in the past. The obtained data have permitted us to set the ecological basis for building several archaeological models about different organizational issues of human groups. In this poster we present the first set of results of one of the newest records recovered by the research team, a core of 270 cm long (Cruces Core 1), drilled in the floodplain of the Barrancas River (S 23°18´08,7"; W 66°05´15,2"; 3666 m asl), Jujuy Province, Northwestern Argentina, that has been dated between ca. 11,5 and 4 K yrs BP. The results of the diatoms and C (TOC & TIC) content analysis that have been carried out on 29 samples preliminary suggest the presence of several paleoenvironmental shifts along the core. The first moment include the development of a low-energy wetland environment in the current mid-basin of Barrancas River during Late Pleistocene. This environment seems to have been replaced by a fluvial system during Early Holocene. Finally, a wetland environment with variable vegetation coverage replaces the former river system during the most part of Mid-Holocene. We discuss the resulting trends and their paleoecological interpretation in terms of their regional significance for understanding environmental history of the Puna landscape during the studied period.