Le tardiglaciaire des Ételles (Alpes françaises du Nord) : instabilité climatique et dynamique de végétation

Abstract

A detailed pollen analysis has been conducted in a new sedimentary sequence taken at Les Ételles (700 m), in the hill vegetation belt in the Chaîne des Hurtières (Northern French Alps). The Lateglacial history of the vegetation has been supported by 10 AMS datings. Variations in relative abundance of main pollen taxa were compared with variations in ð ¹⁸O in Swiss lacustrine sediments and with the GRIP ice-core record. Those highlight how the vegetation reacted to minor climatic oscillations. The Lateglacial spread of Quercus, Alnus and Corylus in the region is confirmed, thus allowing a new interpretation of some Lateglacial sedimentary sequences at an adjacent region (Bas-Dauphiné).