Professor Donald L. Blackstone, Jr., was a prominent Rocky Mountain geologist for over six decades, and with his death on May 24, 2004, the geologic community lost a true giant in the field of structural geology and tectonics. In honor of Don's many contributions to the geology of the Rocky Mountains, a special symposium was convened by Eric A. Erslev (Colorado State University), David R. Lageson (Montana State University), and Arthur W. Snoke (University of Wyoming) at the Annual Meeting of the Geological Society of America (GSA) in Denver, Colorado, November 7–10, 2004. The symposium was titled “New advances in...

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