A deeply buried ~190 MYO (Jurassic) impact of around 7 km in diameter, located near Casper, Wyoming. The structure was discovered through oil and gas exploration.
Evidence of Impact Origin
The impact origin of each location listed on this website has been supported by unambiguous diagnostic evidence of hypervelocity impact that has been reported in a scientific (usually peer reviewed) context. Without such evidence, a geological structure is not a confirmed impact crater. This section, which is included for each crater on this website, is not an exhaustive list of such published evidence, but is meant to demonstrate that appropriate work has been done for each listing.
Other significant evidence: detailed morphologic and morphometric data, seismic, gravity, and magnetic profiles.
Bibliography and References:
(If links to articles don't work, don't give up. Try pasting the link shown into a search engine or searching for the article authors, title, or other reference information. If your research leads you to additional scientific references related to this crater, please help improve this resource by sending a note with the new citation(s) to: firstname.lastname@example.org )
Stone, D. S. 1999. Cloud Creek: A possible Impact Structure on the Casper Arch, Wyoming, The Mountain Geologist, vol. 36, No. 4, Rocky Mountain Association of Geologists.
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.
Regional map with Cloud Creek Crater: