Sfondofrom Smithsonian / GVP Aliso volcano information:
The largely unexplored complex contains a curved summit ridge on the west with older andesitic lava flows and tundra-like vegetation, and rhyolitic and dacitic lava domes in a wet cloud-forest environment on the lower eastern flanks.
The Pumayacu center on the SE flank contains several lava domes along a NNE axis parallel to the Andean Thrust Fault System (TFZ). Morphologically young andesitic lava flows occur along the flat-topped ridge above Baeza town. The Pumayacu center erupted pyroclastic-flow deposits of late Pleistocene and Holocene age. One pyroclastic-flow deposit was dated at about 4400 years Before Present, and a pumice lapilli layer overlies a ceramic-rich cultural horizon thought to be about 2000 years old
See also: Sentinel hub | Landsat 8