A 25 myr chronostratigraphy of ignimbrites in south Peru: implications for the volcanic history of the Central Andes Jean-Claude Thouret Brian R. Jicha Jean-Louis Paquette Evren H. Cubukcu 10.6084/m9.figshare.3186970 https://geolsoc.figshare.com/articles/figure/A_25_myr_chronostratigraphy_of_ignimbrites_in_south_Peru_implications_for_the_volcanic_history_of_the_Central_Andes/3186970 SD Fig. 4 DEFG Postulated old calderas 2016-04-20 09:43:33 Central Andes SD Fig ignimbrite 4 DEFG Postulated caldera implication 25 myr chronostratigraphy Geology