Historiadores e Historias de Juan Calfucura

El propósito de este trabajo es cuestionar la forma en que la historiografía construyó y construye la imagen de los indígenas a través de la figura de uno de sus más importantes representantes: Calfucura. A su vez, intenta descubrir en esa construcción las consecuencias a posteriori para los pueblos originarios y su historia. Para alcanzar este objetivo recorremos las distintas versiones de la historia de Calfucura focalizando en dos ejes principales: la figura del cacique y las relaciones interétnicas.

Benthic foraminiferal assemblage changes during interstadial 4 to 8 in ODP Site 146-893A, Santa Barbara Basin

Benthic foraminiferal assemblages from Santa Barbara Basin exhibit major faunal and ecological switches associated with late Quaternary millennial- to decadal-scale global climate oscillations. Repeated turnovers of entire faunas occurred rapidly (<40-400 yr) without extinction or speciation in conjunction with Dansgaard-Oeschger shifts in thermohaline circulation, ventilation, and climate, confirming evolutionary model predictions of Roy et al. Consistent faunal successions of dysoxic taxa during successive interstadials reflect the extreme sensitivity and adaptation of the benthic ecosystem to the rapid environmental changes that marked the late Quaternary and possibly other transitional intervals in the history of the Earth's ocean-atmosphere-cryosphere system. These data support the hypothesis that broad segments of the biosphere are well adapted to rapid climate change.