�Rubble pile asteroids�! Two rubble pile asteroids colliding to form a meteoroid stream that includes material from BOTH rubble pile asteroids!!
It wouldn�t be much of a stretch to suggest that some of the larger meteoroids in that stream could be rubble piles, as well. Which would be a coincidence, because that is exactly how I recently described the meteoroid that produced the Gold Basin strewn field(s). I have described it as being a loose rubble pile of L6, L5, and L4 meteoroids; held together by the most minimum of gravitational attraction. How else can you explain a strewn field of stony meteorites with such a variation in metamorphic grade, yet NO EVIDENCE of brecciation, meaning that each individual stone is either all L6, or all L5, or all L4, but never a combination of the three? This �rubble pile� theory begs for a new classification scheme: For example, Gold Basin = L4\L5\L6 otherwise, the old standby (L5, anomalous) would be a suitable compromise. Bob V. cc: Nomenclature Committee ----------- Original Message ------------ [meteorite-list] Re: The Pribram/Neuschwanstein Meteoroid Stream Is Not Dead Herbert Raab [EMAIL PROTECTED] Tue, 24 Sep 2002 22:38:15 +0200 ++++snip!++++ There are some great simulations of colliding rubble pile asteroids at this web site: http://www.astro.umd.edu/~dcr/Research/rubble.html When looking at these animations, just think of one rubble pile asteroid made of H-type material, and of the other made of E-chondrites: At the end, you get a new rubble pile, where H- and E-type material is mixed, plus a number of H- and E-type fragments that escape. These fragments will probably share similar orbits - in other words, they form an meteoroid stream that includes both H- and E-type material. Enjoy the animations... ;^) Greetings, Herbert __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
