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

 

Cloud Creek

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Cloud Creek
Wyoming, USA
N 43° 7'
W 106° 45'
7
190 ± 30
N
Y
S
-

 

Map

References
Stone, D. S., Therriault, A. M., The Cloud Creek structure, central Wyoming, U.S.A. - Impact origin confirmed, Meteoritics & Planetary Science, v.38, p.445-455. 2003.
Stone, D. S., Cloud Creek: A possible Impact Structure on the Casper Arch, Wyoming, The Mountain Geologist, vol. 36, No. 4, Rocky Mountain Association of Geologists. 2000.

 

* 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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