Martin wrote: > In the interview, Ebel makes two comments that made me wonder... > First, he mentions that "Most meteorites are pieces of asteroids. > A very few are comets."
> My question is which "very few"? I figure the usual suspects are Orgueil > and Murchison, but some comet experts I have talked with discount them > and all other meteorites as being of cometary origin. .. do not forget Tagish Lake and to some extent Krymka (see David Weir's comments on Krymka on his website: " ... This material is enriched in volatile siderophiles such as Ag, Tl, and Bi, and represents a late condensate from a metal-depleted region of the solar nebula, possibly related to cometary material." > The second thing that caught my eye was when Ebel said, "Chondrites are > really sedimentary rocks made up of dust and then chondrules, these round > droplets that were once molten and now are little beads, many containing > glass, which were present in the solar system." He may have read O.R. Norton's comments in Joel Schiff's magazine: NORTON O.R. (1998) Are chondrites sedimentary rocks? (M! Feb. 1998, Vol. 4, No. 3, pp. 22-23). > My question here is if chondrites can > really be considered sedimentary rocks. The only references I have about sedimentary meteorites: TOMEOKA K. et al. (1997) Evidence for early sedimentary processes in a dark inclusion in the Vigarano CV3 chondrite (Meteoritics 32-4, 1997, A129). TOMEOKA K. et al. (1998) Arcuate band texture in a dark inclusion from the Vigarano CV3 chondrite: Possible evidence for early sedimentary processes (Meteoritics 33-3, 1998, 519-525). BRIDGES J.C. et al. (1998) Traces of Martian sediment in Nakhla and other SNC meteorites (Meteoritics 33-4, 1998, A023). Best wishes, Bernd To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
