Placer Mining Areas In Northern California 1932 - 23x24
More Old Mining Maps Area shown on this map.
PLACER MINING AREAS IN NORTHERN CALIFORNIA (CA) MA
Placer Mining is the mining of the alluvial deposits of minerals. This may be accomplished by open pit by various methods of tunneling into ancient riverbeds. The gold occurs in many different forms: In river channels, in basins & flats, as surface d
-, California United States