Search results
Results from the WOW.Com Content Network
The Lake Superior agate is a type of agate stained by iron and found on the shores of Lake Superior. Its wide distribution and iron-rich bands of color reflect the gemstone's geologic history in Minnesota, Wisconsin, Nebraska, Iowa, Kansas, and Michigan. In 1969 the Lake Superior agate was designated by the Minnesota Legislature as the official ...
The region's far eastern area, containing the Duluth Complex along the shore of Lake Superior, and the far northern area, along the Canada–U.S. border, are not associated with iron ore mining, but deposits of copper, nickel, and cobalt at the northern boundary of the Duluth Complex, where it meets the iron formations, are being considered for ...
Lake Superior is the largest freshwater lake in the world by surface area [a] ... The region surrounding the lake has proved to be rich in minerals, with copper, ...
By 1896, he controlled the Lake Superior Consolidated Iron Mines Company, which was a holding company of the Merritt brothers. He built a fleet of ore ships. In December 1896, he made a deal with Henry W. Oliver and Andrew Carnegie of Pittsburgh whereby they agreed not to go into the ore field or transportation business, and John D. agreed not ...
The ore is generally shipped by lake freighters to locations on the lower Great Lakes. Many steelmaking centers are near Lake Erie. Due to increased international demand, taconite is shipped to Mexico and China. [3] The SS Edmund Fitzgerald, which sank in Lake Superior on November 10, 1975, was carrying about 26,116 long tons of taconite ...
The Grand Sable Dunes today form a five-mile-long sand slope that rises from Lake Superior at a 35° angle. The summits of the tallest dunes are as high as 275 feet (85 m) above lake level. Glacial melt during the last major advance/retreat called the Marquette Readvance created the conditions for the formation of the Grand Sable Banks.
The sandstone has been variously called redstone, brownstone, Lake Superior Sandstone, and Eastern Sandstone. In 1907, the Jacobsville Formation was given its current classification and the name Jacobsville , in honor of Jacobsville, Michigan , a town known for its production of the sandstone.
The Lake Superior iron ores, however, are located far from coal deposits, and the greater tonnage of coal required in steelmaking favored the location of furnaces closer to the coal mines. Favorable locations for steelworks using Lake Superior ore included Great Lakes ports such as Chicago , Cleveland , and Gary , as well as cities close to ...