Arizona-San Bernardino Volcanic FieldGeology Exploration Using Google Earth
Cochise College
Geology Home Page
Geology of Bisbee and Cochise County
Volcanoes and Igneous Rocks
Geology Exploration Using Google Earth
Roger Weller, geology instructor
(wellerr@cochise.edu)
last edited: 4/3/18 19 views
Cochise County sits in the Southeast corner of Arizona adjacent to New Mexico
and Sonora, Mexico. The San Bernardino Valley with its volcanic field is located in
the southeast corner of Cochise County. The San Bernardino volcanic field actually
extends a short distance into Mexico. Within the volcanic field there are dozens
of eroded cinder cones, two maars, and obvious lava flows. Due to the rapid
manner in which basalt chemically weathers in this semi-humid environment there
is plenty of rust-colored volcanic rocks. The youngest of the volcanoes is about
300,000 years old. Some of the oldest features in the volcanic field date back
about 5 million years.
latitude: 31.495 longitude: -109.205
photo credits: Google Earth, Digital Globe, INEGI