Ages for Pyrolusite at Gallagher Vanadium & Rare Minerals Corporation Mine (Gallagher Vanadium Property; Bradsher Mine; Stella Mine; Vogel Mine; Buena Vista Mine), Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 83.6Ma - 68.4Ma at this locality