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Zircon U-Pb data for volcanic ash beds in the Barstow Formation, California probe data 2022

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 04:38 AM | Dataset Last Updated: April 13, 2022 at 12:00 AM
Zircon grains separated from altered ash beds were analyzed to better understand the ages of beds. Isotopic analyses for U-Pb geochronology and trace element geochemistry were performed simultaneously by secondary ion mass spectrometry using the Stanford-USGS SHRIMP-RG ion microprobe housed at Stanford University, USA. Analyses followed the analytical protocol and data acquisition conditions described by Watts et al. (2016). These data are reported in this Release.

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