Hello List, Originally, "orientated" was only used to indicate that something inside a meteorite was arranged or aligned in a certain way: a preferred direction in a crystal lattice, in the matrix of a chondrite or in the matrix of an iron meteorite, etc.
Examples: Borkut (L5) - elliptical chondrules are orientated. Canyon City (IIIAB) - The individual 50-100 ยต wide alpha-grains of the fields are differently orientated, as is evidenced by the various orientations of the epsilon-structure in them. DaG 995 (AEUC) - plagioclase contains small crystallographically orientated inclusions of augite, pigeonite and silica. A. Fujimura et al. (1983) Preferred orientation of phyllosilicate (001) in matrix of Murchison meteorite and possible mechanisms of generating the orientated texture in chondrites (Earth Plan.Sci.Lett. 66, 25-32). But over time, especially since the 1980s, "orientated" also came to be used to denote "flight-oriented". Examples: El Carmen (H6) - A single, orientated mass weighing 629 g was found. Lone Tree (H4) - An orientated, weathered mass of 20.676 kg was ploughed up. Mount Margaret (L5) - A single, flight orientated stone was found. Summerfield (L5) - A single orientated stone of 6.2 kg was found. Waka (H6) - A single, orientated mass weighing 11.875 kg was found. Cheers, Bernd ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
