U-Pb (SHRIMP) Ages of Be and U-rich Opal in Tuffaceous Breccia at Spor Mountain, Utah: Interpreting a Record of Continuous Opal Formation, Episodic Be-U Mineralization, and Remobilization Events

Robert A Ayuso1, Jorge A Vazquez2, Nora Foley1, Graham Lederer1 and Brian Jaskula1, (1)USGS, Reston, VA, United States, (2)U.S. Geological Survey, Menlo Park, United States