Global Volcanism Program | Image GVP-04788
The Río Chillos on the NW side of El Misti volcano has excavated a steep-walled canyon that cuts the lower flanks of the volcano. The NW flank of El Misti is somewhat dissected, in contrast to smoother slopes on other sides. Prevailing winds have distributed a thick ashfall blanket to the NE that mantles the distal margins of youthful lava flows.
Photo by Norm Banks, 1987 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.