31. The surface of the basin is now covered in Quaternary andesitic volcanoes and debris. 32. Andesitic enclaves are also present and some dacites border on silicic andesite in composition.33. Andesitic lavas erupted 2.3?.2 Ma are named Wichhu Qullu lavas.34. These Escorial lava flows are accompanied by andesitic blocks from possibly Vulcanian explosive activity. 35. The eruptions after the collapse were primarily andesitic , or blocky, coagulated lava flow. 36. Rocks erupted by Falso Azufre are andesitic . 37. This was formed predominantly by eruptions of mobile andesitic lava from shallow-sided volcanoes. 38. On top of this unit, an andesitic cone formed, dated at 9 mya. 39. The ash flows are K-rich andesitic -dacitic and contain amphibole and biotite. 40. Pico Laco is an andesitic lava dome with a height of above the surrounding terrain.
