Ice has been present on Coropuna for at least 80,000years. At least two pre-LGM advances spread beyond the area that was covered with ice during the LGM, with an expansion occurring in particular in the eastern sector of the volcano. Moraines older than marine isotope stage 2 are widespread. Those close to the village of Viraco may date back 40,000-45,000years and thus be part of an earlier glaciation, and old dates of 47,000-31,000 and 61,000-37,000years ago in the Huayllaura and Sigue Chico valleys could reflect even larger glacier expansions during marine isotope stage 3 or 4.