Relationship of lahars to streams and stream morphology. The 1913 eruption, and 1990's eruptions. The 1913 eruption was the largest historical event. Meaning of the deposits in terms of the largest possible event. Facies variation of deposits in different areas of the volcano.
Pumice flow stratigraphic subunits, distal limits of youngest pyroclastic flows and lahars.
The gullies of El Cordoban are the most frequently inundated by small block and ash flows from the current activity. If it is safe, we will journey to the gullies to view fresh block and ash flow deposits. Distal debris avalanche and distal lahar deposits.