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G & G research in tephrochronology

Examples of G & G research involving studies of tephrochronology (radiometric dating of volcanic ash layers) in western states include:

Knott, J.R., Sarna-Wojcicki, A.M., Montanez, I.P., and Wan, E., 2007, Differentiating the Bishop ash bed and related tephra layers by elemental-based similarity coefficients of volcanic glass shards using solution inductively coupled plasma-mass spectrometry (S-ICP-MS):  Quaternary International, v. 166, no. 1, p. 79-86. 

Mehringer, P.J., Sarna-Wojcicki, A.M., Wollwage, L.K., and Sheets, Payson, 2005, Age and extent of the Ilopango TBJ tephra inferred from a Holocene chronostratigraphic reference section, Lago de Yojoa, Honduras: Quaternary Research, v. 63, no. 2, p. 199-205.

Sarna-Wojcicki, A.M., Reheis, M.C., Pringle, M.S., Fleck, R.J., Burbank, D., Meyer, C.E., Slate, J.L., Wan, E., Budahn, J.R., Troxel, B., and Walker, J.P., Tephra layers of Blind Spring Valley and related upper Pliocene and Pleistocene tephra layers, California, Nevada, and Utah: Isotopic ages, correlation, and magnetostratigraphy: U.S. Geological Survey Professional Paper 1701, 69 p.,


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