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  2. Gold mining in Colorado - Wikipedia

    en.wikipedia.org/wiki/Gold_mining_in_Colorado

    Before any prospectors in Park County began excavating the mountains, they used placer mining to extract gold from the local waterways. Placer mines began to appear all over Park County after 1861. Placer gold was found in Tarryall, Fairplay, Alma, Breckenridge, and Leadville. [10] A notable amount came from the beds of the South Platte River. [11]

  3. Comstock Lode - Wikipedia

    en.wikipedia.org/wiki/Comstock_Lode

    The Comstock Lode is a lode of silver ore located under the eastern slope of Mount Davidson, a peak in the Virginia Range in Virginia City, Nevada (then western Utah Territory), which was the first major discovery of silver ore in the United States and named after American miner Henry Comstock.

  4. Placer mining - Wikipedia

    en.wikipedia.org/wiki/Placer_mining

    Placer mining (ˈplæsər) [ 1 ] is the mining of stream bed deposits for minerals. [ 2 ] This may be done by open-pit mining or by various surface excavating equipment or tunneling equipment. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits ...

  5. Montana mining history -- Kalispell eighth-graders pan for ...

    www.aol.com/montana-mining-history-kalispell...

    Jan. 21—A sign above Montana History teacher Kris Schreiner's classroom alerts Kalispell Middle School eighth graders that they are entering Alder Gulch to mine for gold and garnets. Alder Gulch ...

  6. Gold mining in the United States - Wikipedia

    en.wikipedia.org/wiki/Gold_mining_in_the_United...

    Swedish gold panners in 1860s Montana. Gold was first discovered in Montana in 1852, but mining did not begin until 1862, when gold placers were discovered at Bannack, Montana in 1862. The resulting gold rush resulted in more placer discoveries, including those at Virginia City in 1863, and at Helena and Butte in 1864. [32]

  7. Alder Gulch - Wikipedia

    en.wikipedia.org/wiki/Alder_Gulch

    Hydraulic gold mining in Alder Gulch, 1871. Photo by William Henry Jackson. Placer mining in Alder Gulch, 1872. Alder Gulch (alternatively called Alder Creek) is a place in the Ruby River valley, in the U.S. state of Montana, where gold was discovered on May 26, 1863, by William Fairweather and a group of men including Barney Hughes, Thomas Cover, Henry Rodgers, Henry Edgar and Bill Sweeney ...

  8. General Mining Act of 1872 - Wikipedia

    en.wikipedia.org/wiki/General_Mining_Act_of_1872

    Major amendments. Amendments. The General Mining Act of 1872 is a United States federal law that authorizes and governs prospecting and mining for economic minerals, such as gold, platinum, and silver, on federal public lands. This law, approved on May 10, 1872, codified the informal system of acquiring and protecting mining claims on public ...

  9. Yogo sapphire - Wikipedia

    en.wikipedia.org/wiki/Yogo_sapphire

    Yogo sapphires are blue sapphires, a colored variety of corundum, found in Montana, primarily in Yogo Gulch (part of the Little Belt Mountains) in Judith Basin County, Montana. Yogo sapphires are typically cornflower blue, a result of trace amounts of iron and titanium. They have high uniform clarity and maintain their brilliance under ...