Collapse, impact or something else?
There are too many thousands of similar examples to count. Demonstrate conclusively that these are impact structures. Go ahead.
http://ida.wr.usgs.gov/html/m09037/m0903757.html
Cheers, BFelix
Space/Science » in reply to Obnoxiously is right.
There are too many thousands of similar examples to count. Demonstrate conclusively that these are impact structures. Go ahead.
http://ida.wr.usgs.gov/html/m09037/m0903757.html
Cheers, BFelix