73-657: Lakehead can refer to: Geographic [ edit ] The head of Lake Superior (and of the Great Lakes), typically referring to the Thunder Bay – Duluth region Lakehead, California , a census-designated place Lakehead-Lakeshore, California , a former census-designated place Education [ edit ] Lakehead University in Thunder Bay, Ontario Pipelines [ edit ] Lakehead Pipeline , in both Canada and
146-512: A capacity of 96 MW; and Hydro-Québec operates generators 6, 7, 8, and 9 with a capacity of 89 MW. Numerous non-contiguous areas of the Ottawa River and its shores are protected in a variety of provincial parks, conservation areas, and municipal parks. In Quebec, there are 3 national parks directly along the Ottawa River ( Oka National Park , Plaisance National Park , and Opémican National Park ), as well as one major nature reserve through which
219-621: A low of 467 m /s (16,500 cu ft/s) in 2010 and a high of 9,094 m /s (321,200 cu ft/s) in 2017. The river flows through large areas of deciduous and coniferous forest formed over thousands of years as trees recolonized the Ottawa Valley after the ice age. Generally, the coniferous forests and blueberry bogs occur on old sand plains left by retreating glaciers, or in wetter areas with clay substrate. The deciduous forests, dominated by birch, maple, beech, oak and ash occur in more mesic areas with better soil, generally around
292-586: A mean discharge of 1,950 m /s (69,000 cu ft/s). It has a maximum depth of 90 m (300 ft) at the Carillon Reservoir and is 7,400 m (24,300 ft) wide at its widest part. The average annual mean waterflow measured at Carillon dam , near the Lake of Two Mountains, is 1,939 m /s (68,500 cu ft/s), with average annual extremes of 749 to 5,351 m /s (26,500 to 189,000 cu ft/s). Record historic levels since 1964 are
365-463: A sunken body will bloat it with gas, causing it to float to the surface after a few days. But Lake Superior's water is cold enough year-round to inhibit bacterial growth , and bodies tend to sink and never resurface. Joe MacInnis reported that in July 1994, explorer Frederick Shannon's Expedition 94 to the wreck of Edmund Fitzgerald discovered a man's body near the port side of her pilothouse, not far from
438-475: A very small ratio (1.55) of catchment area to surface area, which indicates minimal terrestrial influence. American limnologist J. Val Klump was the first person to reach the lowest depth of Lake Superior on July 30, 1985, as part of a scientific expedition, which at 122 fathoms 1 foot (733 ft or 223 m) below sea level is the second-lowest spot in the continental interior of the United States and
511-686: Is Isle Royale in Michigan. Isle Royale contains several lakes, some of which also contain islands. Other well-known islands include Madeline Island in Wisconsin, Michipicoten Island in Ontario, and Grand Island (the location of the Grand Island National Recreation Area ) in Michigan. The larger cities on Lake Superior include the twin ports of Duluth, Minnesota , and Superior, Wisconsin ; Thunder Bay , Ontario; Marquette, Michigan ; and
584-408: Is 0.33 feet (0.10 m) below the datum. In the winter of 1926 Lake Superior reached its lowest recorded level at 1.58 feet (0.48 m) below the datum. Additionally, the entire first half of the year (January to June) included record low months. 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. During
657-423: Is 4,229 feet (1,289 m) above sea level.) While the temperature of the surface of Lake Superior varies seasonally, the temperature below 110 fathoms (660 ft; 200 m) is an almost constant 39 °F (4 °C). This variation in temperature makes the lake seasonally stratified . Twice per year, however, the water column reaches a uniform temperature of 39 °F (4 °C) from top to bottom, and
730-493: Is 80.5 fathoms (483 ft; 147 m) with a maximum depth of 222.17 fathoms (1,333 ft; 406 m). Lake Superior contains 2,900 cubic miles (12,100 km ) of water. There is enough water in Lake Superior to cover the entire land mass of North and South America to a depth of 30 centimetres (12 in). The shoreline of the lake stretches 2,726 miles (4,387 km) (including islands). The lake boasts
803-528: Is a designated scenic road system connecting all of the Great Lakes and the St. Lawrence River. Lake Superior's size reduces the severity of the seasons of its humid continental climate (more typically seen in locations like Nova Scotia ). The water surface's slow reaction to temperature changes, seasonally ranging between 32 and 55 °F (0–13 °C) around 1970, helps to moderate surrounding air temperatures in
SECTION 10
#1732837159643876-449: Is an unusual record of environmental nitrogen buildup. It may relate to anthropogenic alternations to the regional nitrogen cycle , but researchers are still unsure of the causes of this change to the lake's ecology. As for other Great Lakes fish, populations have also been affected by the accidental or intentional introduction of foreign species such as the sea lamprey and Eurasian ruffe . Accidental introductions have occurred in part by
949-479: Is different from Wikidata All article disambiguation pages All disambiguation pages Lake Superior Lake Superior is the largest freshwater lake in the world by surface area and the third-largest freshwater lake by volume , holding 10% of the world's surface fresh water. Located in central North America, it is the northernmost and westernmost of the Great Lakes of North America , straddling
1022-610: Is in the Township of Whitewater Region , Ontario, protecting a series of pristine islands and a small undeveloped section of shoreline along the Ontario side of the Ottawa River. This section of the Ottawa River is known for its whitewater , and is used by a number of commercial rafting companies and many recreational kayakers and canoeists. The park is a non-operating park, meaning that there are no services and facilities for visitors. The park can be used for backcountry camping, whitewater canoeing, swimming, hunting, and fishing. Some of
1095-782: The Canada–United States border with the Canadian province of Ontario to the north and east and the U.S. states of Minnesota to the west and Michigan and Wisconsin to the south. It drains into Lake Huron via St. Marys River , then through the lower Great Lakes to the St. Lawrence River and ultimately the Atlantic Ocean. The Ojibwe name for the lake is gichi-gami (in syllabics : ᑭᒋᑲᒥ , pronounced gitchi-gami or kitchi-gami in different dialects), meaning "great sea". Henry Wadsworth Longfellow wrote this name as " Gitche Gumee " in
1168-685: The French River which later became a link in the historic canoe route to the West. As it does to this day, the river played a vital role in life of the Algonquin people , who lived throughout its watershed at contact. The river is called Kichisìpi , meaning "Great River" in Anicinàbemowin , the Algonquin language. The Algonquin define themselves in terms of their position on the river, referring to themselves as
1241-671: The Hudson Bay watershed, are regulated by the International Lake Superior Board of Control , which was established in 1914 by the International Joint Commission . Lake Superior's water level was at a new record low in September 2007, slightly less than the previous record low in 1926. Water levels recovered within a few days. Historic high water The lake's water level fluctuates from month to month, with
1314-732: The Pic River , the White River , the Michipicoten River , the Bois Brule River and the Kaministiquia River . The lake's outlet at St. Marys River has a relatively steep gradient with rapids. The Soo Locks enable ships to bypass the rapids and to overcome the 25-foot (8 m) height difference between Lakes Superior and Huron. The lake's average surface elevation is 600 feet (183 m) above sea level . Until approximately 1887,
1387-625: The Rapide de la Veillée , the Trou , the Rapide des Deux Rivières , and the Rapide de la Roche Capitaine . (These rapids are now submerged under the reservoir of Holden Lake.) In 1800, explorer Daniel Harmon reported 14 crosses marking the deaths of voyageurs who had drowned in the dangerous waters along this section of the Ottawa. The main trading posts along the river were: Lachine , Fort Coulonge , Lac des Allumettes , Mattawa House , where west-bound canoes left
1460-704: The St. Lawrence River valley and Lake Champlain , had been depressed to below sea level by the glacier's weight, filled with sea water. The resulting arm of the ocean is known as the Champlain Sea . Fossil remains of marine life dating 12 to 10 thousand years ago have been found in marine clay throughout the region. Sand deposits from this era have produced vast plains, often dominated by pine forests, as well as localized areas of sand dunes, such as Westmeath and Constance Bay. Clay deposits from this period have resulted in areas of poor drainage, large swamps, and peat bogs in some ancient channels of this river. Hence,
1533-739: The Whitefish Point Underwater Preserve . Storms that claimed multiple ships include the Mataafa Storm in November 1905 and the Great Lakes Storm of 1913 . Wreckage of SS Cyprus —a 420-foot (130 m) ore carrier that sank on October 11, 1907, during a Lake Superior storm in 77 fathoms (460 ft or 140 m) of water—was located in August 2007. Built in Lorain, Ohio , Cyprus
SECTION 20
#17328371596431606-495: The lake effect snow belts along the shores of the lake, especially in the Upper Peninsula of Michigan . Two recent consecutive winters (2013–2014 and 2014–2015) brought high ice coverage to the Great Lakes, and on March 6, 2014, overall ice coverage peaked at 92.5%, the second-highest in recorded history. Lake Superior's ice coverage further beat 2014's record in 2019, reaching 95% coverage. The largest island in Lake Superior
1679-513: The Hudson's Bay Company name. Many towns around the lake are current or former mining areas, or engaged in processing or shipping. Today, tourism is another significant industry: the sparsely populated Lake Superior country, with its rugged shorelines and wilderness, attracts vacationers and adventurers. Lake Superior has been an important link in the Great Lakes Waterway , providing a route for
1752-770: The Kinouncherpirini or Keinouch, ever inhabited the Ottawa Valley . In 1615, Samuel de Champlain and Étienne Brûlé , assisted by Algonquin guides, were the first Europeans to travel up the Ottawa River and follow the water route west along the Mattawa and French Rivers to the Great Lakes. See Canadian Canoe Routes (early) . For the following two centuries, this route was used by French fur traders , voyageurs and coureurs des bois to Canada's interior. The river posed serious hazards to these travellers. The section near Deux Rivières used to have spectacular and wild rapids, namely
1825-539: The Midcontinent Rift, and there are several amethyst mines in the Thunder Bay area. Lava erupted from the rift and formed the black basalt rock of Michipicoten Island, Black Bay Peninsula, and St. Ignace Island . In the most recent geological history, during the Wisconsin glaciation 10,000 years ago, ice covered the region at a thickness of 1.25 miles (2 km). The land contours familiar today were carved by
1898-548: The Ojibwe name as Otchipwe-kitchi-gami (a transliteration of Ojibwe Gichigami ). In the 17th century, the first French explorers approached the great inland sea by way of the Ottawa River and Lake Huron; they referred to their discovery as le lac supérieur (the upper lake, i.e., above Lake Huron). Some 17th-century Jesuit missionaries referred to it as Lac Tracy (for Alexandre de Prouville de Tracy ). After taking control of
1971-636: The Omàmiwinini, 'down-river people'. Although a majority of the Algonquin First Nation lives in Quebec, the entire Ottawa Valley is Algonquin traditional territory. Present settlement is a result of adaptations made as a result of settler pressures. Some early European explorers, possibly considering the Ottawa River to be more significant than the Upper St. Lawrence River, applied the name River Canada to
2044-586: The Ottawa River and the St. Lawrence River below the confluence at Montreal. As the extent of the Great Lakes became clear and the river began to be regarded as a tributary, it was variously known as the Grand River , "Great River" or Grand River of the Algonquins before the present name was settled upon. This name change resulted from the Ottawa peoples ' control of the river circa 1685. However, only one band of Ottawa,
2117-553: The Ottawa River include (in down-stream order): The Ottawa River lies in the Ottawa-Bonnechere Graben , which is a Mesozoic rift valley that formed 175 million years ago. Much of the river flows through the Canadian Shield, although lower areas flow through limestone plains and glacial deposits. As the glacial ice sheet began to retreat at the end of the last ice age , the Ottawa River valley, which, along with
2190-556: The United States Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Lakehead . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Lakehead&oldid=888338678 " Categories : Disambiguation pages Place name disambiguation pages Hidden categories: Short description
2263-548: The Westmeath sand dune/wetland complex, Mississippi Snye, Breckenridge Nature Reserve, Shirleys Bay, Ottawa Beach/Andrew Haydon Park, Petrie Island, the Duck Islands and Greens Creek. The Westmeath sand dune/wetland complex is significant for its relatively pristine sand dunes, few of which remain along the Ottawa River, and the many associated rare plants. Shirleys Bay has a biologically diverse shoreline alvar, as well as one of
Lakehead - Misplaced Pages Continue
2336-478: The advance and retreat of the ice sheet . The retreat left gravel, sand, clay and boulder deposits. Glacial meltwaters gathered in the Superior basin creating Lake Minong , a precursor to Lake Superior. Without the immense weight of the ice, the land rebounded , and a drainage outlet formed at Sault Ste. Marie, becoming today's St. Mary's River. The first people came to the Lake Superior region 10,000 years ago after
2409-609: The arrival of Europeans, the Anishinaabe made themselves middle-men between the French fur traders and other Native peoples. They soon became the dominant Native American nation in the region: they forced out the Sioux and Fox and won a victory against the Iroquois west of Sault Ste. Marie in 1662. By the mid-18th century, the Ojibwe occupied all of Lake Superior's shores. In the 18th century, as
2482-586: The booming fur trade supplied Europe with beaver hats , the Hudson's Bay Company had a virtual monopoly in the region until 1783, when the rival North West Company was formed. The North West Company built forts on Lake Superior at Grand Portage , Fort William , Nipigon, the Pic River, the Michipicoten River, and Sault Ste. Marie. But by 1821, with competition harming the profits of both, the companies merged under
2555-512: The boundary with the La Varendrye Park. These primeval forests were occasionally affected by natural fire, mostly started by lightning, which led to increased reproduction by pine and oak, as well as fire barrens and their associated species. The vast areas of pine were exploited by early loggers. Later generations of logging removed hemlock for use in tanning leather, leaving a permanent deficit of hemlock in most forests. Associated with
2628-608: The direct ancestors of the Ojibwe and Cree . The people of the Laurel complex (c. 500 BC to AD 500) developed seine net fishing, evidence being found at rivers around Superior such as the Pic and Michipicoten. The people of the Terminal Woodland period were evident in the area from AD 900 to 1650. They were Algonquian peoples who hunted, fished and gathered berries. They used snowshoes , birch bark canoes and conical or domed lodges. At
2701-498: The distribution of forests and wetlands is very much a product of these past glacial events. Large deposits of a material commonly known as Leda clay also formed. These deposits become highly unstable after heavy rains. Numerous landslides have occurred as a result. The former site of the town of Lemieux, Ontario collapsed into the South Nation River in 1993. The town's residents had previously been relocated because of
2774-509: The dominant plant species in them: Scirpus , Eleocharis , Sparganium and Typha . Which type occurs in a particular location depends upon factors such as substrate type, water depth, ice-scour and fertility. Inland, and mostly south of the river, older river channels, which date back to the end of the ice age, and no longer have flowing water, have sometimes filled with a different wetland type, peat bog. Examples include Mer Bleue and Alfred Bog. Major tributaries include: Communities along
2847-526: The highest lake levels in October and November. The normal high-water mark is 1.17 feet (0.36 m) above the datum (601.1 ft or 183.2 m). In the summer of 1985, Lake Superior reached its highest recorded level at 2.33 feet (0.71 m) above the datum. 2019 and 2020 set new high-water records in nearly every month. Historic low water The lake's lowest levels occur in March and April. The normal low-water mark
2920-400: The islands included in the park are Big, Butternut, Cedar, Hazelton, and Lorne Islands, in addition to many unnamed islands. They consists of marble bedrock or low-lying alluvial sands and silts. A total of sixteen regionally significant plant species, such as little bluestem ( Andropogon scoparius ), cordgrass ( Spartina pectinata ) and Indiangrass ( Sorghastrum nutans ) have been found in
2993-621: The lake appeared to have increased by about 4.5 °F (2.5 °C) between 1979 and 2007, compared with an approximately 2.7 °F (1.5 °C) increase in the surrounding average air temperature. The increase in the lake's surface temperature may be related to the decreasing ice cover. Less winter ice cover allows more solar radiation to penetrate and warm the water. If trends continue, Lake Superior, which freezes over completely once every 20 years, could routinely be ice-free by 2040 although more current data through 2021 does not support this trend. Warmer temperatures could lead to more snow in
Lakehead - Misplaced Pages Continue
3066-527: The lake waters thoroughly mix. This feature makes the lake dimictic . Because of its volume, Lake Superior has a retention time of 191 years. Annual storms on Lake Superior regularly feature wave heights of over 20 feet (6 m). Waves well over 30 feet (9 m) have been recorded. Lake Superior is fed by more than 200 rivers, including the Nipigon River , the St. Louis River , the Pigeon River ,
3139-522: The lake. With 78 crewmembers dead, their sinking marked the largest loss of life on Lake Superior to date. SS Edmund Fitzgerald is the last ship that sank in Lake Superior, 15 nautical miles (28 km; 17 mi) from Whitefish Point in a storm on November 10, 1975. The wreck was immortalized by Gordon Lightfoot in his ballad "The Wreck of the Edmund Fitzgerald " . All 29 crew members died, and no bodies were recovered. Edmund Fitzgerald
3212-444: The largest silver maple swamps along the river. Like all wetlands, these depend upon the seasonal fluctuations in the water level. High water levels help create and maintain silver maple swamps, while low water periods allow many rare wetland plants to grow on the emerged sand and clay flats. There are five principal wetland vegetation types. One is swamp, mostly silver maple. There are four herbaceous vegetation types, named for
3285-453: The logging and early settlement were vast wild fires which not only removed the forests, but led to soil erosion. Consequently, nearly all the forests show varying degrees of human disturbance. Tracts of older forest are uncommon, and hence they are considered of considerable importance for conservation. The Ottawa River has large areas of wetlands. Some of the more biologically important wetland areas include (going downstream from Pembroke),
3358-674: The most frequently mined. 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. The mountains steadily eroded, depositing layers of sediments that compacted and became limestone , dolomite , taconite and the shale at Kakabeka Falls . The continental crust
3431-567: The mouth of the Michipicoten River, nine layers of encampments have been discovered. Most of the Pukaskwa Pits were likely made during this time. The Anishinaabe people (an ethnic grouping including the Ojibwe/Chippewa ) have inhabited the Lake Superior region for over five hundred years and were preceded by the Dakota , Meskwaki (Fox) , Menominee , Nipigon, Noquet and Gros Ventres . After
3504-529: The natural hydraulic conveyance through the St. Marys River rapids determined the outflow from Lake Superior. 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 regulating structure is known as the Compensating Works and is operated according to a regulation plan known as Plan 1977-A. Water levels, including diversions of water from
3577-505: The nine-month period of October 1925 to June 1926, water levels ranged from 1.58 feet (0.48 m) to 0.33 feet (0.10 m) below Chart Datum. In the summer of 2007 monthly historic lows were set; August at 0.66 feet (0.20 m), and September at 0.58 feet (0.18 m). According to a study by professors at the University of Minnesota Duluth , Lake Superior may have warmed faster than its surrounding area. Summer surface temperatures in
3650-1027: The open door, "fully clothed, wearing an orange life jacket, and lying face down in the sediment". In February 2024 it was announced that wreckage from the Arlington was discovered from a sinking in 1940. More than 80 species of fish have been found in Lake Superior. Species native to the lake include banded killifish , bloater , brook trout , burbot , cisco , lake sturgeon , lake trout , lake whitefish , longnose sucker , muskellunge , northern pike , pumpkinseed , rock bass , round whitefish , smallmouth bass , walleye , white sucker and yellow perch . In addition, many fish species have been either intentionally or accidentally introduced to Lake Superior: Atlantic salmon , brown trout , carp , chinook salmon , coho salmon , freshwater drum , pink salmon , rainbow smelt , rainbow trout , round goby , ruffe , sea lamprey and white perch . Lake Superior has fewer dissolved nutrients relative to its water volume than
3723-514: The other Great Lakes and so is less productive in terms of fish populations and is an oligotrophic lake . This is a result of the underdeveloped soils found in its relatively small watershed. It is also a reflection of relatively small human population and small amount of agriculture in its watershed. However, nitrate concentrations in the lake have been continuously rising for more than a century. They are still much lower than levels considered dangerous to human health; but this steady, long-term rise
SECTION 50
#17328371596433796-558: The other Great Lakes began sailing in 1816. Ice closes the lake shipping from mid-January to late March. Exact dates for the shipping season vary each year, depending on weather conditions that form and break the ice. The southern shore of Lake Superior between Grand Marais, Michigan , and Whitefish Point is known as the " Graveyard of the Great Lakes "; more ships have been lost around the Whitefish Point area than any other part of Lake Superior. These shipwrecks are now protected by
3869-451: The poem The Song of Hiawatha , as did Gordon Lightfoot in his song " The Wreck of the Edmund Fitzgerald ". According to other sources, the full Ojibwe name is ᐅᒋᑉᐧᐁ ᑭᒋᑲᒥ Ojibwe Gichigami ("Ojibwe's Great Sea") or ᐊᓂᐦᔑᓈᐯ ᑭᒋᑲᒥ Anishinaabe Gichigami (" Anishinaabe 's Great Sea"). The 1878 dictionary by Father Frederic Baraga , the first one written for the Ojibway language, gives
3942-550: The region from the French in the 1760s following their defeat in the French and Indian War , the British anglicized the lake's name to Superior , "on account of its being superior in magnitude to any of the lakes on that vast continent". Lake Superior empties into Lake Huron via the St. Marys River and the Soo Locks (Sault Ste. Marie locks). Lake Superior is the largest freshwater lake in
4015-431: The removal of natural barriers to navigation between the Great Lakes. Overfishing has also been a factor in the decline of fish populations. Ottawa River The Ottawa River ( French : Rivière des Outaouais , Algonquin : Kichi-Sìbì/Kitchissippi ) is a river in the Canadian provinces of Ontario and Quebec . It is named after the Algonquin word 'to trade', as it was the major trade route of Eastern Canada at
4088-489: The retreat of the glaciers in the Last Glacial Period . They are known as the Plano , and they used stone-tipped spears to hunt caribou on the northwestern side of Lake Minong. The Shield Archaic peoples arrived around 5000 BC; evidence of this culture can be found at the eastern and western ends of the Canadian shore. They used bows and arrows, paddled dugout canoes, fished, hunted, mined copper for tools and weapons, and established trading networks. They are believed to be
4161-411: The river and Fort Témiscamingue . From Lake Timiskaming a portage led north to the Abitibi River and James Bay. In the early 19th century, the Ottawa River and its tributaries were used to gain access to large virgin forests of white pine . A booming trade in timber developed, and large rafts of logs were floated down the river. A scattering of small subsistence farming communities developed along
4234-420: The river flows southeast to Ottawa and Gatineau , where it tumbles over Chaudière Falls and further takes in the Rideau and Gatineau rivers. The Ottawa River drains into the Lake of Two Mountains and the St. Lawrence River at Montreal . The river is 1,271 km (790 mi) long; it drains an area of 146,300 km (56,500 sq mi), 65 per cent in Quebec and the rest in Ontario, with
4307-456: The river runs ( La Vérendrye Wildlife Reserve ). Several ZECs ( zone d'exploitation contrôlée ) also line the Ottawa River. Ontario has 7 provincial parks along the banks of the Ottawa River: Voyageur Provincial Park , Fitzroy Provincial Park , Ottawa River Provincial Park, Westmeath Provincial Park , Petawawa Terrace Provincial Park , Driftwood Provincial Park , and Alexander Lake Forest Provincial Park ). The Ottawa River Provincial Park
4380-445: The river. In 1950, the dam at Rapides-des-Joachims was built, forming Holden Lake behind it and thereby submerging the rapids and portages at Deux Rivières. These hydro dams have had negative effects upon shoreline and wetland ecosystems, and are thought to also be responsible for the near extermination of American eels , which were once an abundant species in the river, but which are now uncommon. As an economic route, its importance
4453-506: The shores of the river to provide manpower for the lumber camps in winter. In 1832, following the War of 1812 , the Ottawa River gained strategic importance when the Carillon Canal was completed. Together with the Rideau Canal , the Carillon Canal was constructed to provide an alternate military supply route to Kingston and Lake Ontario , bypassing the route along the Saint Lawrence River . A pulp and paper mill (at Témiscaming ) and several hydroelectric dams have been constructed on
SECTION 60
#17328371596434526-413: The summer (cooler with frequent sea breeze formations) and winter, and creates lake-effect snow in colder months. The hills and mountains that border the lake hold moisture and fog, particularly in the fall. The rocks of Lake Superior's northern shore date back to the early history of the earth. During the Precambrian (between 4.5 billion and 540 million years ago) magma forcing its way to
4599-399: The surface created the intrusive granites of the Canadian Shield . These ancient granites can be seen on the North Shore today. It was during the Penokean orogeny , part of the process that created the Great Lakes tectonic zone , that many valuable metals were deposited. The region surrounding the lake has proved to be rich in minerals, with copper , iron , silver , gold and nickel
4672-503: The suspected instability of the earth in that location. As the land gradually rose again the sea coast retreated and the fresh water courses of today took shape. Following the demise of the Champlain Sea the Ottawa River Valley continued to drain the waters of the emerging Upper Great Lakes basin through Lake Nipissing and the Mattawa River . Owing to the ongoing uplift of the land, the eastward flow became blocked around 4000 years ago. Thereafter Lake Nipissing drained westward, through
4745-402: The third-lowest spot in the interior of the North American continent after Great Slave Lake in the Northwest Territories of Canada (1,503 ft or 458 m below sea level) and Iliamna Lake in Alaska 942 ft or 287 m. (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
4818-414: The time. For most of its length, it defines the border between these two provinces. It is a major tributary of the St. Lawrence River and the longest river in Quebec. The river rises at Lac des Outaouais, north of the Laurentian Mountains of central Quebec, and flows west to Lake Timiskaming . From there its route has been used to define the interprovincial border with Ontario. From Lake Timiskaming,
4891-403: The transportation of iron ore as well as grain and other mined and manufactured materials. Large cargo vessels called lake freighters , as well as smaller ocean-going freighters , transport these commodities across Lake Superior. Shipping was slow to arrive at Lake Superior in the 19th century. The first steamboat to run on the lake was the Independence in 1847, whereas the first steamers on
4964-636: The twin cities of Sault Ste. Marie, Michigan , and Sault Ste. Marie, Ontario . Duluth-Superior , at the western end of Lake Superior, is the most inland point on the Saint Lawrence Seaway and the most inland port in the world. Among the scenic places on the lake are Apostle Islands National Lakeshore , Brockway Mountain Drive on the Keweenaw Peninsula , Isle Royale National Park , Porcupine Mountains Wilderness State Park , Pukaskwa National Park , Lake Superior Provincial Park , Grand Island National Recreation Area, Sleeping Giant (Ontario) and Pictured Rocks National Lakeshore . The Great Lakes Circle Tour
5037-535: The world by area and the third largest in volume, behind Lake Baikal in Siberia and Lake Tanganyika in East Africa . The Caspian Sea , while larger than Lake Superior in both surface area and volume, is brackish . Lake Superior has a surface area of 31,700 square miles (82,103 km ), which is approximately the size of South Carolina or Austria . It has a maximum length of 350 statute miles (560 km ; 300 nmi ) and maximum breadth of 160 statute miles (257 km; 139 nmi). Its average depth
5110-406: Was battered so intensely by Lake Superior that the 729-foot (222 m) ship split in half; her two pieces lie approximately 170 feet (52 m) apart at a depth of 88 fathoms (530 ft or 160 m). Lightfoot sings that "Superior, they said, never gives up her dead". This is because of the unusually cold water, under 36 °F (2 °C) on average around 1970. Normally, bacteria decaying
5183-505: Was eclipsed by railroad and highways in the 20th century. It is no longer used for log driving, however, it is still extensively used for recreational boating. Some 20,000 pleasure boaters visit the Carillon Canal annually. Today, Outaouais Herald Emeritus at the Canadian Heraldic Authority is named after the river. Hydroelectric installations on the Upper Ottawa (in downstream order): Lower Ottawa (in downstream order): * Ontario Power Generation operates generators 2, 3, 4, and 5 with
5256-478: Was later riven , creating one of the deepest rifts in the world. The lake lies in this long-extinct Mesoproterozoic rift valley , the Midcontinent Rift . Magma was injected between layers of sedimentary rock , forming diabase sills . This hard diabase protects the layers of sedimentary rock below, forming the flat-topped mesas in the Thunder Bay area. Amethyst formed in some of the cavities created by
5329-486: Was launched August 17, 1907, and was lost on her second voyage hauling iron ore from Superior, Wisconsin, to Buffalo, New York , with the sole survivor among her 23 crew being Charles G. Pitz. In 1918 the last warships to sink in the Great Lakes, French minesweepers Inkerman and Cerisoles , vanished in a Lake Superior storm, perhaps upon striking the uncharted danger of the Superior Shoal in an otherwise deep part of
#642357