Ages for Pyrolusite at Round Mountain Mine (Round Mountain Gold Mine; Sunnyside Mine; Sphinx Glory Hole; Great Western Tunnel; Rattlesnake; Keane Vein; Los Gazabo Vein), Round Mountain, Round Mountain, Round Mountain District, Toquima Range, Nye Co., Nevada, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 99Ma - 26Ma at this locality