Through the work I am doing on the geochemical characterisation of my cores  alongisde palaeoecological analysis (Pollen  NPPS  micro-Charcoal and Phytoliths)  I am trying to establish whether ancient agricultural systems in two regions of Peru  the Cordillera Blanca (Ancash Region) and the Chillón Valley (Lima and Juinin Regions)  were resilient to intensive human activities and extreme periods of climate change over the past two millennia