Using U-Pb ages of Miocene tufa for correlation in a terrestrial succession, Barstow Formation, California, Cole, J. M.; Rasbury, E. T.; Hanson, G. N.; Montanez, I. P.; Pedone, V. A. , Geological Society of America Bulletin, Mar-Apr, Volume 117, Issue 3-4, p.276-287, (2005), Doi 10.1130/B25553.1 Abstract