| Tunnunik impact structure | |
| Other Name: | Prince Albert impact crater |
| Location: | Prince Albert Peninsula |
| Map: | Canada Northwest Territories#Canada |
| Map Alt: | Map of the Northwest Territories in Canada, showing where the Tunnunik impact crater is located. |
| Coordinates: | 72.4667°N -169°W |
| Confidence: | Confirmed |
| Diameter: | ~25km (16miles) |
| Age: | ~450–430 million years |
| Exposed: | Yes |
| Country: | Canada |
| Province: | Northwest Territories |
The Tunnunik impact structure, formerly known as the Prince Albert Impact Crater, is a recently confirmed meteorite impact structure. It is located on Prince Albert Peninsula in the northwestern part of Victoria Island in Canada's Northwest Territories.
The 25km (16miles) wide structure 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 structure is estimated to have formed between 450 and 430 million years ago, during the Ordovician period, based mainly on paleomagnetic analysis.[1] It is estimated that it was created when a meteor a few kilometres in diameter struck the Earth.[2] The desert-like landscape of impact structure like Tunnunik can be useful in understanding the geology of other rocky planets such as Mars.
It is Canada's 30th known meteorite impact feature.
Not to be confused with the unconfirmed Victoria Island structure in California, United States.