The White Mountains in east-central Arizona were the site of middle to late Cenozoic volcanism. The lava flows, volcaniclastic, and epicIastic rocks can be separated into two age groups: the first of Oligocene and Miocene age and the second of late Miocene-Pleistocene age. The first period of activity preceded the delineation of the Colorado Plateau and Basin and Range geologic provinces, and is contemporaneous with volcanism in the Mogollon Plateau region of New Mexico. For the full report and geologic map and cross sections by R.K. Merrill and T.L. Pewe: http://repository.azgs.az.gov/uri_gin/azgs/dlio/1879
Photographer: Anonymous
Photo Date: 1977
Photo Location Accuracy: Approximately Located
Photo Tags: White Mountains, Mogollon Escarpment, glacial geology, Pleistocene, volcanism, Springerville volcanic field, Oligocene, Miocene, Pliocene 
