The Ungava Peninsula , officially Péninsule d'Ungava , is the far northwestern part of the Labrador Peninsula of the province of Quebec , Canada. Bounded by Hudson Bay to the west, Hudson Strait to the north, and Ungava Bay to the east, it covers about 252,000 km (97,000 sq mi). Its northernmost point is Cape Wolstenholme , which is also the northernmost point of Quebec. The peninsula is also part of the Canadian Shield , and consists entirely of treeless tundra dissected by large numbers of rivers and glacial lakes, flowing generally east–west in a parallel fashion. The peninsula was not deglaciated until 6,500 years ago (11,500 years after the Last Glacial Maximum ) and is believed to have been the prehistoric centre from which the vast Laurentide Ice Sheet spread over most of North America during the last glacial epoch.
19-516: Ungava may refer to: The Ungava Peninsula , located in northern Quebec Ungava (electoral district) , the largest and most northern provincial electoral district of Quebec Ungava Bay , on the northern coast of Quebec — on Hudson Strait District of Ungava , a former district of the Canadian Northwest Territories, now divided into parts of Quebec and Labrador Ungava:
38-493: A Tale of Esquimaux Land , 1857 novel by R. M. Ballantyne Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Ungava . 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=Ungava&oldid=1191533336 " Category : Disambiguation pages Hidden categories: Short description
57-611: A navigational aid. On June 20, 1943, a United States Army Air Force plane on a meteorological flight over the Ungava region of Quebec Province took a photograph that showed the wide crater rim rising up above the landscape. In 1948, the Royal Canadian Air Force covered the same remote area as part of its program of photomapping Canada, though these photographs were not made publicly available until 1950. Ontario diamond prospector Frederick W. Chubb became interested by
76-464: Is 500 ppm). It is one of the most transparent lakes in the world, with a Secchi disk visible more than 35 m (115 ft) deep. The lake has no inlets or apparent outlets, so the water accumulates solely from rain and snow and is lost only through evaporation. The crater was formed by a meteorite impact 1.4 Ma , as estimated by Ar/ Ar dating of impact melt rocks. An analysis of these rocks also revealed planar deformation features as well as
95-589: Is a relatively young impact crater located on the Ungava Peninsula in the administrative region of Nord-du-Québec , in Quebec , Canada. It is 3.44 km (2.14 mi) in diameter, and is estimated to be 1.4 ± 0.1 million years old ( Pleistocene ). The crater and the surrounding area are now part of Pingualuit National Park . The only species of fish in the crater lake is the Arctic char . The crater
114-459: Is different from Wikidata All article disambiguation pages All disambiguation pages Ungava Peninsula The Unavuk Peninsula is part of the Nunavik proposed autonomous area of Quebec. The Ungava Peninsula has an estimated population of 10,000 inhabitants. These are 90% Inuit , and live in 12 villages spread along the coast. The largest village, Kuujjuaq , is the capital of
133-530: Is exposed to the surface, rising 160 m (520 ft) above the surrounding tundra , and is 400 m (1,300 ft) deep. The 267 m-deep (876 ft) Pingualuk Lake fills the hollow, and is one of the deepest lakes in North America. The lake also holds some of the purest fresh water in the world, with a salinity level of less than 3 ppm (by comparison, the salinity level of the Great Lakes
152-556: Is extremely cold ( Dfc in the Köppen climate classification ) because the Labrador Current keeps the region (and all of northern Québec ) colder in the summer than other regions at comparable latitudes: Pingualuit crater The Pingualuit Crater ( French : Cratère des Pingualuit ; from Inuit "pimple"), formerly called the "Chubb Crater" and later the "New Quebec Crater" ( French : Cratère du Nouveau-Québec ),
171-690: The Canadian Shield where the Rae Province connects with the Superior Province. The region is composed of Archean rocks (ca. 2.7–2.9 Ga) from the Douglas Harbour Domain (see Superior Craton ). The Archean rocks are overlain by Paleoproterozoic supracrustal sequences (ca. 1.8–2.1 Ga) and intruded by Paleoproterozoic diabase dykes (ca. 2.0–2.2 Ga). The supracrustal rocks comprise nappes that form part of
190-543: The Harvard – Smithsonian Center for Astrophysics and reported to the 51st Meteoritical Society in 1988 by Ursula Marvin and David Kring. Boulger returned to the area that summer, along with a research party led by M. A. Bouchard of the University of Montreal . Three years later Canadian geologist Richard A. F. Grieve listed New Quebec among the 130 known terrestrial impact craters. In 1992, Marvin and Kring documented
209-558: The Kativik Regional Government , which includes all of the peninsula. The peninsula's offshore islands are part of the Nunavut Territory . The region is accessible by air services, with links to southern Québec, and seasonal shipping when sea-ice breaks up. Thick permafrost prevents the use of conventional building techniques in some areas. The Ungava Peninsula is situated on the northeast portion of
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#1732775371826228-655: The Ungava and Labrador troughs . In the zone east of the Labrador Trough axis, the Paleoproterozoic deformation reworked the Archean rocks of the Douglas Harbour Domain, as well as the Paleoproterozoic diabase dykes. The metamorphic conditions which parallel the deformation increase from west to east and from middle amphibolite to granulite facies . U–Pb isotope analyses of zircon yield secondary ages around 1790 Ma. These results are interpreted as
247-474: The age of metamorphism and indicate a reactivation of the northeastern margin of the Superior Province during a Paleoproterozoic tectono - metamorphic event, resulting from probable continental collision. (Madore, 2001). Pingualuit impact crater is located on the peninsula. The Ungava brown bear , an extinct population of the grizzly bear , is named after this peninsula. The climate
266-419: The composition of the meteorite itself. Enrichments of iron, nickel, cobalt, and chromium found in impact melt samples suggest that the meteorite was chondritic in nature. Once largely unknown to the outside world, the lake-filled crater had long been known to local Inuit , who knew it as the "Crystal Eye of Nunavik" for its clear water. World War II pilots often used the almost perfectly circular landmark as
285-566: The crater with Chubb in 1950; it was on this trip that Meen proposed the name "Chubb Crater" for the circular feature and "Museum Lake" for the irregular body of water about 2 mi (3.2 km) north of the crater (now known as Laflamme Lake). Following his return, Meen organized a proper expedition with the cooperation of the National Geographic Society and the Royal Ontario Museum . They travelled to
304-417: The petrographic analysis of two impact melt samples collected within the crater rim. They presented evidence of shock metamorphism , which is consistent with similar impact crater sites. In 1999, the name was again changed, to "Pingualuit". The crater and the surrounding area are now part of Canada's Pingualuit National Park , created on January 1, 2004. Professor Reinhard Pienitz of Laval University led
323-531: The site in a PBY Catalina flying boat in July 1951, landing on nearby Museum Lake. Attempts to find fragments of nickel-iron from the meteorite using mine detectors lent by the US Army were unsuccessful due to the area's granite containing high levels of magnetite . A magnetometer survey did find a magnetic anomaly under the crater's northern rim, however, indicating that a large mass of metal-bearing material
342-410: The strange terrain shown in the photographs and sought the opinion of geologist V. Ben Meen of the Royal Ontario Museum . Chubb hoped that the crater was that of an extinct volcano , in which case the area might contain diamond deposits similar to those of South Africa . However, Meen's knowledge of Canadian geology tentatively ruled out a volcanic origin. Meen subsequently made a brief trip by air to
361-544: Was buried below the surface. Meen led a second expedition to the crater in 1954. That same year its name was changed to "Cratère du Nouveau-Quebec" ("New Quebec Crater") at the request of the Quebec Geographic Board . An expedition led by James Boulger in 1986 collected a small rock sample from the area surrounding the New Quebec Crater. Petrographic analysis of this sample was conducted at
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