850m - Lacs Merlet (2450m) Lac du Pêtre (2282m) 1826.4 1838 1845.5 1855.3 1870 1877.4 1877.3 1879 1879.2 1887 1889.2 1893.1 1898.1 1903.4 1914.9 1939.8 1961.5 1970.8 1986.6 2002 2010.9 2017.7 2033.4 2045.1 2060.2 2069.5 2075.1 2095.5