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Azurite or Azure spar [5]: 14 is a soft, deep-blue copper mineral produced by weathering of copper ore deposits. During the early 19th century, it was also known as chessylite , after the type locality at Chessy-les-Mines near Lyon , France . [ 3 ]
The formal geological name for the Lead Belt is the "Southeastern Missouri Mississippi Valley-type Mineral District". It contains the highest concentration of galena (lead(II) sulfide) in the world [2] as well as significant economic quantities of zinc, copper and silver and currently mined sub-economic quantities of metals such as cadmium, nickel and cobalt. [2]
Miners rushed to lay claims for mining rights, mostly in a mountainous area about five miles south of Amity in the foothills of the Ouachita Mountains. Two companies, "Southwestern Quicksilver Company" and the "Arkansas Quicksilver Company", were the main employers. The rush was short-lived, but did provide employment in the area for almost a ...
Thanks to David Yurman, the American Museum of Natural History has opened a new exhibit of sparkling quartz crystals. 4,000 Pounds of Crystal Mined in Arkansas Are Now on Glorious Display in NYC ...
Missouri Mines State Historic Site occupies Federal Mill No. 3 in Park Hills, Missouri, United States, which processed the lead and zinc ore that was mined in the immediate area for many decades. The site's old power building features a geological and mining history museum and interpretive center focusing on the state's historic Old Lead Belt .
The interior of SubTropolis. SubTropolis is a business complex located inside of a 55,000,000-square-foot (5,100,000 m 2), 1,260-acre (5.1 km 2) mine in the bluffs north of the Missouri River in Kansas City, Missouri, United States.
Between the two zones is the Missouri Gravity Low, or MGL, a mass of low density granite including the Missouri batholith up to 370 miles long and 60 miles wide, identified in gravity surveys. Igneous activity ended around 1.3 billion years ago, with the intrusion of numerous dikes and sills into newly crystallized rhyolite and granite.
The Rush Historic District is a zinc mining region of the Ozark Mountains in Arkansas. Now located within Buffalo National River , the district includes ruins dating from 1880 to 1940. The area was an important part of what became known as the North Arkansas Lead and Zinc District , and played a role in the development of railroads and modern ...