Tunnunik impact crater

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Tunnunik impact crater
Prince Albert impact crater
Map of the Northwest Territories in Canada, showing where the Tunnunik impact crater is located.
Map of the Northwest Territories in Canada, showing where the Tunnunik impact crater is located.
Tunnunik impact crater
Location of the Tunnunik Impact Crater in the Northwest Territories
Impact crater/structure
Confidence Confirmed
Diameter ~25 kilometers (16 mi)
Age ~130–350 million years
Exposed Yes
Location Prince Albert Peninsula
Coordinates 72°28′N 113°56′W / 72.467°N 113.933°W / 72.467; -113.933Coordinates: 72°28′N 113°56′W / 72.467°N 113.933°W / 72.467; -113.933
Country Canada
Province Northwest Territories

The Tunnunik impact crater, formerly known as the Prince Albert Impact Crater, is a recently confirmed meteorite impact crater.[1] It is located on Prince Albert Peninsula in the northwestern part of Victoria Island[A] in Canada's Northwest Territories.[2]

The 25-kilometer-wide (16 mi) crater was discovered in 2010 by Brian Pratt, professor of geology at the University of Saskatchewan, and Keith Dewing of the Geological Survey of Canada during an aerial survey of the region. The crater is estimated to have formed between 130 and 350 million years ago, and may have been created when a meteor a few kilometers in diameter struck the Earth.[3] The desert-like landscape of impact craters like Tunnunik can be useful in understanding the geology of other rocky planets such as Mars.[4]

It is Canada's 30th known meteorite impact feature.


^[A] Not to be confused with the unconfirmed Victoria Island structure in California, United States.


  1. ^ "Tunnunik (Prince Albert)". Earth Impact Database. Planetary and Space Science Centre. Retrieved July 16, 2015. 
  2. ^ "Researchers discover new impact crater in the Arctic". University of Saskatchewan. 2012-07-25. Archived from the original on 2013-02-19. The researchers discovered the crater two summers ago while exploring the area by helicopter for the Natural Resources Canada (NRCan) Geo-Mapping for Energy and Minerals program, and it took two years to properly assemble the geological maps and submit their article for publication. Pratt and Dewing named the new discovery the Prince Albert impact crater after the peninsula where it is situated. Note: Geographic coordinates are in the comments section. 
  3. ^ "Meteor crater: Huge hole 25 kilometres wide discovered in Arctic, but was it made by a meteorite?". Saskatoon: The Toronto Star. 2012-07-25. Archived from the original on 2013-02-19. Retrieved 2012-08-09. Pratt said he and Dewing knew from earlier surveys of the remote area that dipping, and even vertical rock faces, had been found on Victoria Island, so they wanted to check them out. Most rocks in the Arctic have horizontal strata and have never been folded or faulted by tectonic pressure, Pratt explained. 
  4. ^ Kate Kyle (2015). Victoria Island impact crater lures scientists, astronauts. CBC News 2015

External links[edit]