Sunset Crater basalt cinder cone was active about A.D. 1025, making it the youngest of the fields 600 cinder cones. The larger O'Leary Peak is an older dacite porphyry dome. Image courtesy of Google Earth.
Photographer: Mike Conway
Photo Date: circa 2015
Photo Location Accuracy: Known Location
Photo Tags: San Francisco volcanic field, geotourism, volcanism, O'Leary Peak, Sunset Crater, basalt, dacite