A revised stratigraphy of the area is determined, which is supported
by 35 stratigraphic sections assisted by radiocarbon dating of 16 paleosols
(Table 2). As summarized, approximately 87% of the deposits described
consist of debris flow deposits typical of alluvial fans (Blair, 1999b;
Harvey, 2002a; Staley et al., 2006). The Los Chocoyos hyperconcentrated
flow deposit (≤84 ka) and 1902 pyroclastic fall deposit of Santa María