Global Volcanism Program | Image GVP-07505
The Sierra La Primavera complex has been the site of extensive geothermal development. The drill rig here is at well PR-5, which was drilled to a depth of 1215 m. This well is located near the center of the caldera, just south of the Mesa El Nejahuete lava dome. Surface exposures in this location consist of tuffaceous lacustrine sediments and comenditic airfall tuffs. Volcán Tequila can be seen faintly on the center horizon to the NW.
Photo by Pat Dobson, 1982 (Lawrence Berkeley National Laboratory).