Abstract Exposures of the Cretaceous Cerro Toro Formation, southern chile, provide an opportunity to compare and contrast the facies architecture of outer-and inner-levee deposits associated with a deep-water, slope channel system ( Figure 1A ). In the study area, located just to the east of Lago Pehoe ( Figure 1B ), a series of conglomerate-filled, southeast-trending channel systems have been mapped ( Beaubouef, 2004 ). The best exposed of these, referred to as channel-complex set 3, is up to 5 km (3 mi) wide and 200 m (650 ft) thick. Internally, set 3 is composed of channel complexes that aggrade and shift laterally to the south. The focus of this study is on deposits that flank channel-complex set 3 to the east. Two outcrop panels are discussed. The first, referred to as Lago Nordenskjold, is located about 1 km (0.6 mi) from the margin of channel-complex set 3; it was interpreted as an outer levee ( Devries and Lindholm, 1994 ; Beaubouef, 2004 ). The second, referred to as Laguna Mellizas Sur, is located at the margin of channel-complex set 3 and interpreted in this paper as an inner levee.