Paquereau-Lebti, Perrine Neogene and Quaternary ignimbrites in the area of Arequipa, southern Peru: stratigraphical and petrological correlations - Amsterdam Elsevier June 2006 - pp. 251-275 ilus. Subjects--Topical Terms: CUATERNARIODATACION AR-ARESTRATIGRAFÍAIGNIMBRITANEOGENOPETROLOGÍASILLAR Subjects--Geographic Terms: AREQUIPAPERU