Hi all - Speaking of the small crater at Carancas, a prominent theory put forward to explain the number of craters on Mars is "secondary" craters formed by the impact of large ejecta from "primary" impacts, i.e.:
http://hirise.lpl.arizona.edu/PSP_007059_1975 Given the energy required to form an impact crater of any size, I am very suspicious of this hypothesis. I can't see how any large ejecta from a "primary" impact could reach sufficient velocity to have the energy necessary to form these "secondary" craters, and I think that some may be engaging in wishful thinking in this regard. Given what we know of asteroids and comets, smaller chunks of a "primary" impactor impacting at the same time might be a more viable hypothesis. Any thoughts, anyone? good hunting all, ("d" is too close to "f" with my stroke, and "goof" is as good a word as "good" to a spell checker.) E.P. Grondine Man and Impact in the Americas ____________________________________________________________________________________ You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost. http://tc.deals.yahoo.com/tc/blockbuster/text5.com ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
