mariposa gold mines gold stamp mill
Stamp mill Wikipedia. Gold mining began at an early date in the county Gravels along Agua Fria and Mariposa Creeks were worked before 1849 and were thoroughly mined out by the hordes of prospectors who overran the area during the gold rush of 1849 By July 1849 a stamp mill was processing ore from the first lode discovery in the county the Mariposa mine on the