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The California gold rush (1848–1855) began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. [1] The news of gold brought approximately 300,000 people to California from the rest of the United States and abroad. [ 2 ]
Gold Hill in Grass Valley, California, was the site of one of the first discoveries of quartz gold [2] in California. While quartz gold was also found in other areas of Nevada County, California during the same time, it is this find near Wolf Creek that led to quartz-mining frenzy and subsequent creation of the Gold Country quartz-mining industry.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 February 2025. American pioneer who discovered gold in California in 1848 For other people named James W. Marshall, see James W. Marshall (disambiguation). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced ...
A worker constructing the mill, James W. Marshall, found gold there in 1848. This discovery set off the California gold rush (1848–1855), a major event in the history of the United States. The mill was later reconstructed in the original design and today forms part of Marshall Gold Discovery State Historic Park in Coloma, California.
A golden state: mining and economic development in Gold Rush California (California History Sesquicentennial Series, 2). Berkeley and Los Angeles: University of California Press. ISBN 0-520-21771-3. {}: |author= has generic name CS1 maint: multiple names: authors list ; Starr, Kevin (2005). California: a history.
Californium is a silvery-white actinide metal [12] with a melting point of 900 ± 30 °C (1,650 ± 50 °F) and an estimated boiling point of 1,743 K (1,470 °C; 2,680 °F). [13] The pure metal is malleable and is easily cut with a knife. Californium metal starts to vaporize above 300 °C (570 °F) when exposed to a vacuum. [14]
The Horn Silver Mine was discovered in 1870 with the first discovery of significant value occurring in 1875. On September 24 of that year, Samuel Hawks (or Hawke) and James Ryan uncovered silver-bearing rock at the Horn Silver Ledge in what later became the San Francisco mining district near Milford, Utah.
The first elemental metal with a clearly identifiable discoverer is cobalt, discovered in 1735 by Georg Brandt, by which time the Scientific Revolution was in full swing. [6] (Even then, cobalt might have been prepared before the 13th century by alchemists roasting and reducing its ore, but,in any case, its distinct nature was not recognised.) [7]