'A placer is a deposit of sand containing metals such as this, which brought an influx to Placer County, California'
gold
GEOLOGY: A placer is a deposit of sand containing metals such as this, which brought an influx to Placer County, California
A placer is a deposit of sand containing metals such as this, which brought an influx to Placer County, California
A placer is a deposit of sand containing metals such as this, which brought an influx to Placer County, California
GEOLOGY
gold
GEOLOGY