Mike in CO writes: "You will probably think I am a bit off the latch with this question but here goes anyway... In the world of meteorite terminology, is there a term or word which describes the loss of fusion crust (by forces of nature) from stony meteorites. 'Spalling' possibly? The loss of crust, part or all, seems to be a rather common occurrence especially for some of the more friable stonys. With the crust gone, the stone is 'denuded'?"
Hi Mike and List, here are some examples: ALHA77294 (H5): Polygonally fractured, dull, brownish black fusion crust, approximately 1 mm thick, covers all surfaces of this meteorite (~13.5 x 9.0 x 6.0 cm), with the exception of the edges, which appear to have been s p a l l e d. ALHA78040 (AEUC): The crust has been removed from the edges by s p a l l a t i o n and has been preferentially weathered away on the surfaces in small circular areas. ALHA78132 (AEUC): The crust has been s p a l l e d or chipped in some areas ... ALHA79022 (L3.7-4): The areas devoid of fusion crust appear to have been s p a l l e d off or preferentially plucked off because they occur along ridges. Bagdad (IIIAB): Most of the fusion crust has s p a l l e d off due to terrestrial corrosion (Buchwald)... Best wishes, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
