Ian LangeIan Lange, a graduate of Dartmouth College, with a Ph.D. from the University of Washington in geology and stable isotope geochemistry, has studied volcanic rocks and mineral deposits in Peru, the continental United States, and British Columbia. He ha worked for exploration companies as well as for his own personal love of the topic. Dr. Lange has also assessed mineral deposits for the U.S. Geological Survey in Alaska. In addition, he has been involved in ground-based thermal remote sensing of dormant and active Cascade and Central American volcanoes. Dr. Lange has taught geology at the university level in California, New Hampshire, and Montana. When not studying volcanoes, volcanic rocks, and mineral deposits, Dr. Lange taught for over 30 years at the University of Montana. During his teaching career, he authored and co-authored more than 100 papers about mineral deposits and volcanic rocks in national and international geological journals and in Science magazine. Read More Read Less