Randy writes: "Most of the 'holes' don't look so much like regmaglypts to me. Maybe some are chemical weathering features ...
http://www.nasa.gov/mission_pages/mer/images/mer20090806.html Hello Randy and List, I certainly agree! These 'holes' look like the ones we know from the Willamette iron, ...those "bowl-shaped cavities" * * BUCHWALD V.F. (1975) Handbook of Iron Meteorites, Volume 3, pp. 1318, excerpts: "It can, therefore, be assumed that, when Willamette landed in the distant past, it had a shape and sculpture very similar to that of Morito. It must have been deeply furrowed on the cone side with radiating flutings, while the antiapex was a flat, somewhat crowning surface with shallow - but large - depressions. The meteorite must have been significantly more massive then, possibly weighing more than 20 tons. This leaves us with a mass which by some mysterious process has lost more than six tons since it fell. For this to occur it appears that we have to resort to terrestrial weathering processes, as already suggested by Ward (1904c) ... It appears, however, that given sufficient time and the right conditions of dilute, aerated sulfuric acid from decomposing troilite, the cavities may reach the surprising scale observed on Willamette." Best wishes, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
