Simon Puaud is a geologist specialized in the prehistoric sites geology. He began his formation in Geology in a geologic engineer school. After a Master and a PhD in the Perpignan University. He specialized in Geology applied to Quaternary and Prehistory. He has focused his researches on the palaeoenvironmental interpretation of a sedimentary sequence of a southeastern French prehistoric site. Since 15 years he works on the palaeoclimatic and palaeoenvironmental interpretation of quaternary sequences from the cave and rock shelters sediments analyses. After his PhD (2007), he was hired by the CNRS as a study engineer. He works currently on numerous projects led by searchers of Museum national d’Histoire naturelle and CNRS in France, Crimea, Cyprus, Cambodia, Thailand and Georgia. The possibility to study sedimentary infillings of papuan rockshelters is very important because this kind of approach is new. The high altitude of the Papuan sites is an opportunity to compare them with the European quaternary sites of the last glacial by studying the characteristics of the sediments and the sedimentary dynamics.