In summer 2010, three of our members joined an excursion organized by the SEG Student Chapter of the ETH Zürich to learn about the geology and ore deposits of the South Western USA. Participants from the Geological Survey of Spain and the University of Oregon completed the group of about 30 people. During the 14 days lasting excursion we visited several different types of world class deposits, including the Carlintype Goldstrike deposit, the Bingham Canyon porphyry‐Cu mine, Mother Lode Au veins in California and the whole porphyry Cu system at Yerginton. Our special thanks goes to Ingo Steinberger and Christoph A. Heinrich, both from ETHZ, responsible for the logistical and geological/scientific aspects of the excursion, respectively.

brittle vs. ductile deformation, Mother Lode (+) Truck tire, Bingham Canyon (+) Bingham Canyon open pit (+) Antelope Island, Utah (+) Half Dome, Yosemite National Park, California (+)

Mother Lode quartz veins, California (+) Driving down into THE PIT (+) Blast in the open pit of the Carlin-type Au deposit Goldstrike, Nevada (+) Melissa and Jo in the field (+) magmatic layering, Yosemite National Park (+)