Search results
Results from the WOW.Com Content Network
A copper deposit was discovered in the present town of East Granby, Connecticut in 1705, and German metallurgists from Hanover were imported to reduce the ore to copper metal. [27] The mine was shut down in 1725, and the property served as a prison from 1773 to 1897. [28]
In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. [12] Copper metallurgy was flourishing in South America, particularly in Peru around 1000 AD; it proceeded at a much slower rate on other ...
The Etowah plates, including the Rogan Plates, are a collection of Mississippian copper plates discovered in Mound C at the Etowah Indian Mounds near Cartersville, Georgia. Many of the plates display iconography that archaeologists have classified as part of the Southeastern Ceremonial Complex (S.E.C.C.), specifically "Birdman" imagery ...
44% of mining facilities in the United States are located in forests. Large-scale mining in areas of Latin America, like Brazil, release pollutants detrimental to neighboring rainforests. [38] Copper mining efforts in the Carajas Mineral Province in Brazil result in 6,100 km of deforestation every year. [38]
Sican tumi, or ceremonial knife, Peru, 850–1500 CE. Metallurgy in pre-Columbian America is the extraction, purification and alloying of metals and metal crafting by Indigenous peoples of the Americas prior to European contact in the late 15th century.
In South America a copper mask dated to 1000 BC found in the Argentinian Andes is the oldest known copper artifact discovered in the Andes. [111] Peru has been considered the origin for early copper metallurgy in pre-Columbian America , but the copper mask from Argentina suggests that the Cajón del Maipo of the southern Andes was another ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The Anaconda Copper Mining Company, known as the Amalgamated Copper Company from 1899 to 1915, [1] was an American mining company headquartered in Butte, Montana. It was one of the largest trusts of the early 20th century and one of the largest mining companies in the world for much of the 20th century.