Route description: James Bay Road, Trans Taiga Road to Air Saguenay base at Lac Pau, float plane to Lac Nedlouc. Despite Canada’s great size, it is one of the world’s most sparsely populated countries. [9] Boulger returned to the area that summer, along with a research party led by M. A. Bouchard of the University of Montreal. Meteoritics 1: 228-229. 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 is 500 ppm). Meen subsequently made a brief trip by air to 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). [3] The lake has no inlets or apparent outlets, so the water accumulates solely from rain and snow and is lost only through evaporation. They travelled to the site in a PBY Catalina flying boat in July 1951, landing on nearby Museum Lake. Meen, V. Ben. “Pingualuit” is the Inuktitut term for skin blemishes caused by cold weather. Ungava-Quebec Crater, also called New Quebec Crater, formerly Chubb Crater, geologically young crater of meteoritic origin located in the northwestern part of the Ungava Peninsula, northern Quebec province, Canada. Filled by a lake 250 metres (820 feet) deep, it is surrounded by many smaller circular lakes. [3], Planetary and Space Science Centre University of New Brunswick Fredericton, "Peterography of Impactite from New Quebec Crater", Aerial Exploration of the Pingualuit (New Quebec) Structure,, Creative Commons Attribution-ShareAlike License, This page was last edited on 19 November 2020, at 07:44. First recognized as an impact structure in 1950, the crater is 3.4 km (2.1 miles) in diameter and has a rim standing as much as 160 metres (525 feet) above ground level. Ungava Bay is separated from Hudson Bay by the Ungava Peninsula. The surrounding rocks are tilted upward toward the centre of the crater and are broken here and there by radial fissures. When NASA’s Terra satellite passed over northern Quebec on November 25, 2012, winter snow and ice had transformed the pockmarked landscape of Ungava Peninsula into a seemingly endless expanse of white. Evidence on the nature of the Ungava Crater unobscured by glaciations , Meteoritics, vol. An analysis of these rocks also revealed planar deformation features as well as the composition of the meteorite itself. Meen, V. B., Chubb crater, Ungava, Quebec. This article was most recently revised and updated by, The 267 m-deep (876 ft) Pingualuk Lake fills the hollow, and is one of the deepest lakes in North America. [6] 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. 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 is 500 ppm). Akpatok Island is largest of the many islands in Ungava Bay. The crater cannot be approached by car because of the rocky terrain. Enrichments of iron, nickel, cobalt, and chromium found in impact melt samples suggest that the meteorite was chondritic in nature. [4], 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. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Our editors will review what you’ve submitted and determine whether to revise the article. Evidence on the nature of the Ungava Crater unobscured by glaciations. It was hoped that these finds would yield information about climate change dating back to the last interglacial period 120,000 years ago. It is 450 meters (1,476 ft) in diameter and the age is estimated to be less than 100,000 years. This fact, coupled with the grandeur of the landscape, has been…, Quebec, eastern province of Canada. 1950. Bathymetric studies suggest that Ungava Bay may be the remnant of an impact crater (age unknown) approximately 225 km (140 mi) in diameter. [11] They presented evidence of shock metamorphism, which is consistent with similar impact crater sites. [7] Meen led a second expedition to the crater in 1954. Microfacies and microstructures of a 9 m long sediment core are presented to discuss the depositional environment of deformed glacigenic and postglacial sequences deposited in the deep basin of the lake. The Pingualuit Crater (Ungava Peninsula, Canada) hosts a freshwater basin in which a subglacial lake subsisted under the Laurentide Ice Sheet during the last glacial period. Premium Membership is now 50% off! Journal of the Royal Astronomical Society of Canada, v. 44, pp. Bathymetric studies suggest Ungava Bay may be the remnant of an impact crater (age unknown) approximately 225 km in diameter. The lake has no in… The crater is exposed to the surface, rising 160 m (520 ft) above the surrounding tundra, and is 400 m (1,300 ft) deep. Wolfe Creek Crater, Australia. 228-229) Leonard, Frederick C. 1954. wells Creek area (three era ters) , Tenn. West Hawk Lake, Canada Wilbarger dome, Tex. World War II pilots often used the almost perfectly circular landmark as a navigational tool.[5]. [5] Preliminary results show that the upper 8.5-metre (28 ft) sediment core contains records of two interglacial periods. Professor Reinhard Pienitz of Laval University led a 2007 expedition to the crater which extracted sediment cores from the bottom of the lake, which were filled with fossil pollen, algae, and insect larvae. Its capital, Quebec city, is the oldest city in Canada. The Inuktitut word “Ungava” means far away. I checked the weather report … The crater’s age is estimated to be 1.4 million years. [10] In 1992, Marvin and Kring documented the petrographic analysis of two impact melt samples collected within the crater rim.


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