Ages for Chalcopyrite at Loma Prieta Mine (Commercial Mine; Copper Glance Mine; Patented Claims MS 3425; Copper Hill Mine [?]; Copper Basin Group [in Part]), Copper Basin District, Sierra Prieta Mts, Yavapai Co., Arizona, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 64Ma - 64Ma at this locality