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Gold mining Wikipedia

The exact date that humans first began to mine gold is unknown but some of the oldest known gold artifacts were found in the Varna Necropolis in Bulgaria.The graves of the necropolis were built between 4700 and 4200 BC indi ing that gold mining could be at least 7000 years old.

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Early Gold Mining Methods Sierra Foothill Magazine

As time went on gold mining became increasingly more sophisti ed. The solitary gold miner of the 1840s gave way to hundreds of miners toiling in deep hard rock mines such as those found in Jackson and Grass Valley. In other areas such as Malakoff Diggins huge hydraulic hoses washed away entire mountainsides in the search for gold.

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The Fisher Gold Bug 2 uses tried and true though older technology. This model has a long and successful history with prospectors and it does very well in a wide variety of terrain. If you are on a budget its hard to go wrong with the Fisher Gold Bug 2.

What is Longwall Mining with pictures Info Bloom

The entire process is mechanized. Longwall mining machines are about 800 feet 240 meters in width and 5 to 10 feet 1.5 to 3 meters tall. The miners extract quotpanelsquot rectangular blocks of coal as wide as the mining machinery and as long as 12000 feet 3650 meters .

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gold mining history

Almost a half century later in 1904 an 18yearold hunter Roy Briggs relo ed the lost mine. This small pocket produced gold in slabs one inch thick and two to three feet long. A total of at least 50000 was recovered from the vein 12 to 14 inches wide 12 feet long and 7 feet deep.

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