[meteorite-list] Fusion Crust on Irons--Not

From: MEM <mstreman53_at_meteoritecentral.com>
Date: Wed, 18 Nov 2009 19:30:39 -0800 (PST)
Message-ID: <544927.16157.qm_at_web55203.mail.re4.yahoo.com>

Stopping in a few minutes to state again that all this discussion about fusion crust on irons is right next to unicorns postulations. Everyone says that fusion crust on irons exists but no one can come up with the proof. Non-silicate bearing irons DO NOT/CANNOT have FUSION crust: they have a very fragile magentite micro-crystal "film" and they have an ablation surface but, they can't by definition have a "fusion crust" and no matter whom the expert quoted they still do not have a fusion crust. A fusion crust has to have a silicate source to for the glass component of the crust-- Nada, Nix, No How.

Both silicate and non-silicate meteorites have an ablated/ablation surface, and they can show flight features--but not all meteorites have a fusion crust. I have some OCs which have flow lines UNDER the fusion crust remnants.

If anyone still defends the presence of fusion crust on (non-silicate bearing) irons then show me the "crust"...can't?..ok show me the glass? .... right then-- no photos, no thin sections, no micro graphs???......And while there was one close up of an ablated surface showing soft wavy lines of briefly melted metal that was aligned to aerodynamic vectors--This does not fusion crust make.

Unlike in politics and public opinion, in science, no matter how often an untruth is repeated it doesn't become "truth" by majority belief. But science, being a human endeavor, sometimes can find itself "off track" and when it does it accepts the error and gets back on track.

Elton
Received on Wed 18 Nov 2009 10:30:39 PM PST