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How can I tell if I have found an impact crater?

The USGS Astrogeology Research Program explains that although the USGS has been involved in impact crater research, it is neither the expert facility nor ultimate authority for confirming a feature as an impact crater. The website provides links to the University of New Brunswick (UNB) Planetary and Space Science Center (PASSC) because it is the best resource for confirming a structure as an impact crater. UNB maintains a database of identified and confirmed impact craters and the only way to confirm that a structure is indeed an impact crater on Earth is to visit the site and search for impact indicators (such as shatter cones, melts, etc) and follow the list of criteria provided.

PASSC Director: John Spray
Data Manager: Jason Hines
Planetary and Space Science Centre
University of New Brunswick
Fredericton, New Brunswick, Canada
Queries to: passc@unb.ca

Learn more: Terrestrial Impact Craters at the University of Arizona Lunar Planetary Laboratory.

Tags: Metals, Meteorite, Crater