Ages for Idaite at Mammoth Mine (Mammoth Copper Company; Anderson Mine; Mayflower Mine; Sheridan Mine; Gillispie Mine), Copper Crest Group, Mammoth Butte, Backbone District, West Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 390Ma - 390Ma at this locality