Mountain Pass geochronology data

Zircon U-Pb geochronology results for alkaline silicate rocks from “Site 1,” located 500 m northeast of the Mountain Pass mine pit. Uppermost panels show all age data, concordant and discordant. Middle panels show concordant age data with calculated concordia ages. Bottom panels shown error-weighted mean ages and probability density functions for concordant age data. From Watts et al. (2022).