Thouret, Jean-Claude Jicha, Brian R. Paquette, Jean-Louis Cubukcu, Evren H. A 25 myr chronostratigraphy of ignimbrites in south Peru: implications for the volcanic history of the Central Andes SD Fig. 2. U-Pb zircon diagrams Central Andes SD Fig;ignimbrite;zircon;diagram;implication;25 myr chronostratigraphy;2.;Geology 2016-04-20
    https://geolsoc.figshare.com/articles/journal_contribution/A_25_myr_chronostratigraphy_of_ignimbrites_in_south_Peru_implications_for_the_volcanic_history_of_the_Central_Andes/3187012
10.6084/m9.figshare.3187012.v1