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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 January 2004, the CSN board announced the approval of investments up to US$820 million to be made through 2007, including: expansion of production at the Casa de Pedra iron ore mine from 15.5 to approximately 40 million tons; expansion of the coal terminal adjacent to the Sepetiba Port facilities to enable annual exports of up to 30 million ...
The Rio Grande silvery minnow or Rio Grande minnow (Hybognathus amarus) is a small herbivorous North American fish. It is one of the seven North American members of the genus Hybognathus, in the cyprinid family. The Rio Grande silvery minnow is one of the most endangered fish in North America, according to the U. S. Fish and Wildlife Service ...
The Rio Grande silvery minnow was listed as endangered in 1994 as its numbers dwindled to only 7 percent of its historic range. Lawsuit to protect minnow imperiled in Pecos River, Rio Grande of ...
Mining leader Rio Tinto (NYSE:RIO) has announced a $143 million (A$215 million) investment to establish a new research and development facility in Western Australia dedicated to low-emission ...
Vale's Mariana Hub was the 9th largest iron ore mining center in the world in 2014, with an output of 39 million metric tonnes. [14] Vale's Serra Sul / S11D is the largest mining reserve in the world. The company's iron ore mines are primarily in Brazil. [8] Nickel: Vale is the world's largest nickel producer. [13]
Colorado Fuel & Iron mine at El Moro, c. 1900. The first, and only until World War II, integrated iron and steel mill west of St. Louis was built in 1881 in Pueblo on the south side of the Arkansas River by the Colorado Coal and Iron Company (CC&L), an affiliate of the narrow-gauge Denver and Rio Grande Railway Company (D&RG), controlled by General William Jackson Palmer and Dr. William ...
Aug. 14—South of Rio Bravo, through a gate, across a metal bridge over a ditch full of running water and up a soft dirt route in the bosque, a stream of visitors found the fifth-largest ...