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Alluvial placers are those formed in river or stream sediments. Another name for alluvial placers are stream placers. [2] Typical locations for alluvial gold placer deposits are on the inside bends of rivers and creeks; in natural hollows; at the break of slope on a stream; the base of an escarpment, waterfall or other barrier. Stream placers ...
Plate depicting placer mining from the 1556 book De re metallica. Placers supplied most of the gold for a large part of the ancient world. Hydraulic mining methods such as hushing were used widely by the Romans across their empire, but especially in the gold fields of northern Spain after its conquest by Augustus in 25 BC.
Placer County (/ ˈ p l æ s ər / PLASS-ər; Placer, Spanish for "sand deposit"), officially the County of Placer, is a county located in the U.S. state of California. As of the 2020 census, the population was 404,739. [4] The county seat is Auburn. [5] Placer County is included in the Greater Sacramento metropolitan area.
The Hoosier Gulch was a mining district, also known as the Hoosier Pass district, [3] located along the Park-Summit County line, at the headwaters of the Blue River, ten miles south of Breckenridge, at over 10,000 feet in elevation. [4] [2]
Located on the north flanks of Denali, the District was a hard place to operate a mine. Nevertheless, some of the largest gold nuggets found in Alaska have been found in the area, including the 9th largest (92 troy ounces). 92,000 ounces of placer gold and 8000 ounces of gold from lode mines has come from the district. [ 40 ]
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A former Maidu settlement called Indak was located at the site of the town. [9]After the discovery of gold at Sutter's Mill in nearby Coloma, California, by James W. Marshall in 1848 sparked the California Gold Rush, the small town now known as Placerville was known as Dry Diggin's after the manner in which the miners moved cartloads of dry soil to run water to separate the gold from the soil.
Auburn is located at [ 13 ] According to the United States Census Bureau , the city has a total area of 7.2 square miles (19 km 2 ), of which 0.03 square miles (0.078 km 2 ), or 0.38%, is water.