Photos from November 2011 Tucson Mtns. Caldera field trip


On 5 November 2011, world-famous structural geologist George Davis led a group of us, including some of Mihai Ducea's Geos 251 Honors Section, on a field trip to the Tucson Mountains. We learned about the amazing cross-section of a Late Cretaceous caldera exposed in the range, including the huge variety of lithologies in the enigmatic "Tucson Mountains Chaos," the incredible observational skills of Ernest B. Mayo (a venerable structural geologist at UA before G. Davis), the synthetic acumen and immortalization of the geology by volcanologist Peter Lipman, the fascinating small-scale thrust and normal faults throughout the range, the pediments in "the Embayment," the Cat Mountain Rhyolite, Silver Lily Dikes, huge megabreccias, and all in all had a fabulous day, great weather, good stories, and spectacular geology. Some pictures are below. In addition to George Davis and the Geos 251 students, other field trippers were TA Tyler Huth, Pete Lippert, Fariq Mustapha, and Layne Reiners.


The group looking west from the Tucson Mtns, over Avra Valley, on a gorgeous day after a lovely rain.

Tyler Huth and Pete Lippert atop a nice west-dipping Silver Lily Dike.

Dropping acid on the ol' Penn-Perm limestone in the megabreccia of the Tucson Mountain Chaos.

The history of the Tucson Mtns. comes alive through the art of G. Davis.