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Earth Impact Database Sorted by : | Name | Diameter | Age |

 

Tunnunik

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Tunnunik (formerly Prince Albert)
Victoria Island, Arctic Canada
N 72° 28'
W 113° 58'
~ 25
>130, <450
Y
N
S
-

Click here for images of shatter cones from the University of Saskatchewan's Flikr page.

TanDEM-X elevation model of Tunnunik
(provided by Manfred Gottwald,German Aerospace Center)

References
Dewing, K., Pratt, B. R., Hadlari, T., Brent, T., Bédard, J. and Rainbird, R. H. 2013. Newly identified “Tunnunik” impact structure, Prince Albert Peninsula, northwestern Victoria Island, Arctic Canada. Meteoritics & Planetary Science. doi: 10.1111/maps.12052.

 

* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

***
From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)

 

 

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