Re: [meteorite-list] What killed off megafauna?
Earth provides no real protection for the Moon from asteroid/meteoroid impact. I think the earth subtends something like one 15,000th of the celestial sphere from Luna's perspective. Yes, there is a gravitational factor that improves that a bit, but you're still talking a tiny fraction of a percent "protection". Doubt it's even measurable as far as earth impact rate vs. Moon's. --Rob From: Meteorite-list [meteorite-list-boun...@meteoritecentral.com] on behalf of E.P. Grondine via Meteorite-list [meteorite-list@meteoritecentral.com] Sent: Thursday, June 23, 2016 4:39 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] What killed off megafauna? Hi Paul - Two of the impact events are now pretty well known: http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3656 http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3668 Of course, work is just beginning on the sequence of impacts for South America and their related meltwater pulses. It is really strange to watch the psychological process of denial going on here. I wish I had just a small part of the money spent on this denial for more research into what actually occurred. Or better yet, have your personal salary dependent on actual impact research. That would certainly focus your own fine skills. BTW, you can not use impact data from the Moon in a straight line to estimate the impact hazard for the Earth. The Earth usually protects the Moon from impactors. E.P. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Tridymite Discovered On Mars
NASA scientists discover unexpected mineral on Mars NASA/Jet Propulsion Laboratory, June 22, 2016 https://www.sciencedaily.com/releases/2016/06/160622170422.htm http://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html Richard V. Morris, David T. Vaniman, David F. Blake, Ralf Gellert, Steve J. Chipera, Elizabeth B. Rampe, Douglas W. Ming, Shaunna M. Morrison, Robert T. Downs, Allan H. Treiman, Albert S. Yen, John P. Grotzinger, Cherie N. Achilles, Thomas F. Bristow, Joy A. Crisp, David J. Des Marais, Jack D. Farmer, Kim V. Fendrich, Jens Frydenvang, Trevor G. Graff, John-Michael Morookian, Edward M. Stolper, Susanne P. Schwenzer. Silicic volcanism on Mars evidenced by tridymite in high-SiO2 sedimentary rock at Gale crater. Proceedings of the National Academy of Sciences, 2016; 201607098 DOI: 10.1073/pnas.1607098113 http://www.pnas.org/content/early/2016/06/07/1607098113 yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] What killed off megafauna?
Hi Paul - Two of the impact events are now pretty well known: http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3656 http://archaeologica.boardbot.com/viewtopic.php?f=9&t=3668 Of course, work is just beginning on the sequence of impacts for South America and their related meltwater pulses. It is really strange to watch the psychological process of denial going on here. I wish I had just a small part of the money spent on this denial for more research into what actually occurred. Or better yet, have your personal salary dependent on actual impact research. That would certainly focus your own fine skills. BTW, you can not use impact data from the Moon in a straight line to estimate the impact hazard for the Earth. The Earth usually protects the Moon from impactors. E.P. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Sariçiçek TS Contributed by: Anne Black http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/23/2016 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
