Notable production includes gold from the Hemlo mine near Marathon, copper from the Keweenaw Peninsula and the Mamainse Point Formation, iron from the Gogebic Range, silver at Silver Islet, and uranium at Theano Point. Lake Superior is a fresh water lake, 1.333 feet deep in certain places. It was during the Penokean orogeny, part of the process that created the Great Lakes Tectonic Zone, that many valuable metals were deposited. Lake Superior is not only the largest of the Great Lakes; it is the largest body of fresh water on Earth. It was taken from the submarine Celia during a 1994 dive. The last time that Lake Superior almost entirely froze over was in 1979 when the lake reached 94.7% ice coverage. above Lake Huron). The low water was a continuation of the dropping lake levels from the previous year, 1925, which set low-water records for October through December. Visit our corporate site. Exact dates for the shipping season vary each year, depending on weather conditions that form and break the ice. Deepest Lake in North America: Great Slave Lake. Lake Superior has been an important link in the Great Lakes Waterway, providing a route for the transportation of iron ore as well as grain and other mined and manufactured materials. Until approximately 1887, the natural hydraulic conveyance through the St. Marys River rapids determined the outflow from Lake Superior. Lake Superior- Is the Largest and Deepest Great Lake. The first people to settle in the region arrived around 8000 B.C., after glaciers retreated, according to History of Lake Superior: A Timeline. Water levels, including diversions of water from the Hudson Bay watershed, are regulated by the International Lake Superior Board of Control, which was established in 1914 by the International Joint Commission. The lake's average surface elevation is 600 feet (183 m) above sea level. Shipping was slow to arrive at Lake Superior in the 19th century. Amethyst formed in some of the cavities created by the Midcontinent Rift and there are several amethyst mines in the Thunder Bay area.. Fifty-one species of fish (native and non-native) reproduce in Lake Superior.  The lake lies in this long-extinct Mesoproterozoic rift valley, the Midcontinent Rift. The wreck of the Edmund Fitzgerald in Lake Superior is seen in this photo of the 729-foot vessel, resting in two pieces 530 feet below the surface. The North West Company built forts on Lake Superior at Grand Portage, Fort William, Nipigon, the Pic River, the Michipicoten River, and Sault Ste. There are 78 different species of fish that call the big lake home. Because of its volume, Lake Superior has a retention time of 191 years. By 1921, development in support of transportation and hydroelectric power resulted in gates, locks, power canals and other control structures completely spanning St. Marys rapids. The average water temperature is 40 F (4.4 C) — lower than the other Great Lakes, which are farther south. The numbers for the worldâs largest â¦ How deep is Lake Superior? By Lake whitefish live in deep waters mainly along Lake Superior's South Shore.  This would be a significant departure from historical records as, according to Hubert Lamb, Samuel Champlain reported ice along the shores of Lake Superior in June 1608. The deepest point in Lake Superior (about 40 miles north of Munising, Michigan) is 1,300 feet (400 meters) below the surface. In the winter of 1926 Lake Superior reached its lowest recorded level at 1.58 feet (0.48 m) below datum. 8, The average elevation of Lake Superior is about 602 feet above sea level. The southern shores of Lake Superior boasts Pictured Rocks, a 42 mile stretch of gorgeous, multicolored sandstone cliffs with waterfalls and caves galore. Lake Superior's Deepest Point is 1,333 ft (406 m) deep! It takes almost 200 years for the lake to refill with new water, according to the University of Wisconsin. It called this because it is north of Lake Huron, which was discovered first by Brûlé. The Duluth Ship Canal is an artificial canal cut through Minnesota Point, providing direct access to Duluth harbor from Lake Superior.Begun privately in 1871, it was put under federal supervision and maintenance several years later. During the Precambrian (between 4.5 billion and 540 million years ago) magma forcing its way to the surface created the intrusive granites of the Canadian Shield. ... 12. The first people came to the Lake Superior region 10,000 years ago after the retreat of the glaciers in the last Ice Age. Lake Superior's size reduces the severity of the seasons of its humid continental climate (more typically seen in locations like Nova Scotia). To reach its deepest point, you'd need to descend 1,276 feet â about the distance of a ride down from the top floor of Chicago's 108-story Willis Tower. Lake Superior's basin is home to nearly 60 orchid species. It is still an important component of the harbor facilities. The deepest point in Lake Superior is 1,300 feet (400 meters) below the surface, making a complete freeze a â¦ By the early 1600s, the Ojibway people had established a village of several thousand on Madeline Island. Lake Baikal in southern Russia is the world's deepest lake. Receive mail from us on behalf of our trusted partners or sponsors? If you stand on a bank, you will not even come close to seeing the other side, as itâs 167 miles wide and 350 miles long. , The Anishinaabe People, which includes the Ojibwe or Chippewa, have inhabited the Lake Superior region for over five hundred years and were preceded by the Dakota, Fox, Menominee, Nipigon, Noquet and Gros Ventres. Freezing of the lakes is monitored because it affects hydropower generation, commercial shipping, the fishing industry and more, according to the Office of Oceanic and Atmospheric Research. 5. They used bows and arrows, paddled dugout canoes, fished, hunted, mined copper for tools and weapons, and established trading networks. How Deep is Crater Lake? , Lake Superior has fewer dissolved nutrients relative to its water volume than the other Great Lakes and so is less productive in terms of fish populations and is an oligotrophic lake. They are believed to be the direct ancestors of the Ojibwe and Cree.. (Though Crater Lake is the deepest lake in the United States and deeper than Lake Superior, Crater Lake's elevation is higher and consequently its deepest point is 4,229 feet (1,289 m) above sea level.