Author Affiliations +
L. BARRY ALBRIGHT,1,* DAVID D. GILLETTE,2 ALAN L. TITUS3
1aUniversity of North Florida, Department of Chemistry and Physics, 4567 South St. Johns Bluff Rd., J
2bMuseum of Northern Arizona, Department of Geology, 3101 N. Fort Valley Rd., Flagstaff, Arizona 8600
3cGrand Staircase-Escalante National Monument, 190 East Center St., Kanab, Utah, 84741 U.S.A.,
**Corresponding author