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