open access Radioactive Phonolite and Associated Thorium - Rare Earth - Niobium Veins in the Laughlin Peak Area, Chico Hills, Colfax County, New Mexico Description: Report discussing the investigation of possibly commercial amounts of thorium, niobium and rare earths which were found in veins of igneous rock areas in Laughlin Peak, New Mexico. Date: December 1958 Creator: Tschanz, Charles M.