Hi Elton and All,
I've read about the very slow cooling rate of the molten iron in various books but I don't understand why this is so. Why would it take millions of years for just a few drops of degrees? It's hard for me to envision this even accounting for bombardments and radioactive decay. Radioactivity from the original super nova event, right? Maybe it's because I think of space as being so darned cold it wouldn't take anything long to lose heat and freeze up. I realize radioactivity takes a long time to decay but would it take a lot or so little to keep a large planetary body hot for so long? Thanks. Carl Eman wrote: >I think this theory has a potential fatal flaw if what we think we know about taenite/kamacite growth is valid. Without an insulating blanket the molten pool will not exist in a molten state long enough to permit crystallization aka Widmanstatten patterns. Be it remembered that Widmanstatten pattern/crystal growth is very very slow on the order of 10's of degrees cooling per million years. It is difficult to develop a scenario that integrates a large crater on an Goldilocks Asteroid which works.. .. _________________________________________________________________ Hotmail® is up to 70% faster. Now good news travels really fast. http://windowslive.com/online/hotmail?ocid=PID23391::T:WLMTAGL:ON:WL:en-US:WM_HYGN_faster:082009 ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
