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;. Fig and . Valderrama, Google Earth images of zones A and B, and comparison with experimental results. A) Subparallel ridges of typical length of 100-500 m and interdistance of 10-30 m, and experimental deposit of the mixture with 15 wt% of 600-710 ?m coarse particles showing ridges formed from merged margins of granular fingers. B) Frontal lobes in distal area, Map of Tutupaca volcano showing the two units of the 218 ± 14 aBP debris avalanche deposit (DAD) and their longitudinal ridges, vol.11, 2016.