Ages for Magnesite at Golden Rule Mine, Jumper & Golden Rule Group (Jumper Mine; Jumper Claim; Jumper Deposit; New Era Claim), Jamestown Mine (Jamestown Group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 5.3Ma - 0Ma at this locality