Alván De la Cruz, Aldo Alfonso Stratigraphic characterization of Arequipa basin from sedimentary stacking pattern and ammonites biozones - Lima Sociedad Geológica del Perú 2012 - 5 p. ilus. Subjects--Topical Terms: AMMONITESBIOZONACIONESTRATIGRAFÍAJURASICOPALEOGEOGRAFIA Subjects--Geographic Terms: AREQUIPAPERU