CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
capítulos de libros
Título:
The peatlands of Argentine Tierra del Fuego as a source for paleolcimatic and paleoenvironmental information
Autor/es:
RABASSA, J.; CORONATO, A.; HEUSSER, C.J.; ROIG JUÑENT, F.; BORROMEI, A.; ROIG, C.; QUATTROCCHIO, M.
Libro:
Peatlands: Evolution and record of Environmental and Climate Changes
Editorial:
Elsevier
Referencias:
Año: 2006; p. 129 - 145
Resumen:
Abstract The existing peat-bogs of Argentine Tierra del Fuego were formed during the recession of the ice after the maximum of the Last Glaciation (ca. 24 calendar ka ago). As the ice was receding, vegetation changed from tundra and cold steppe to Sub-Antarctic forest environments. The Fuegian peat-bogs have a outstanding record of over 14,600 14C years, from the Late Glacial (i.e., 15-10 14C ka B.P.) to present times, with excellent preservation of different geological and palaeoenvironmental materials within their layers. Tephra beds, pollen, tree wood, organic matter and charcoal fragments have been widely recorded in dozens of sites over an area of 20,000 km2. All these proxy materials provide excellent paleoenvironmental and paleoclimatic information, with at least a secular resolution. Fossil peat layers in glaciolacustrine and glaciofluvial deposits of the Last Glaciation (Late Pleistocene) have also been investigated, providing the only paleo-vegetation records of full-glacial times so far available in the Fuegian Archipelago. The occurrence of charcoal particles in a region where spontaneous fires are very uncommon is used as a proxy for early human occupation.