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  -

Residual Topography


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.
Stone D. S., Hull J. P. D., Parker Gray S. Jr., The Mountain Geologist, Volume 36, Number 4, 1999.
* 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)