Hi list, Not a typo, one article that covers such things as conversion of a standard bright field microscope to polarization, various lighting techniques, as well as chondrule formation.
A little slow in parts but then again, this isn't HBO! An example to persuade you to take a look or cause you to hit your delete key so fast it's left with fusion crust. "The "classic" barred olivine texture is a single plate dendrite (Donaldson, 1976) which shares the entire chondrule with the remaining glass or subsequent crystallization products. Olivine rimming the chondrule is often in optical continuity with the dendrite and thus is part of the plate dendrite. Because this texture is so striking, barred olivine (BO) chondrules are well known even to people outside the field of meteorites. When chondrules are discussed, a photomicrograph of a barred olivine texture is usually chosen as one of a few or even the only example. It is not surprising that considerable effort has been expended understanding its origin. Barred olivine textures comprise only a few percent of melt-textured chondrules, usually less than 5% (Gooding and Keil, 1981). The "classic" barred texture represents only 10% of the type 3 ordinary chondrite BO chondrules. By careful study, Weisberg (1987) determined that the multiple plate dendrite is a much more common that the single dendrite. Most investigators propose that BO chondrules form from melt droplets that crystallize rapidly upon cooling." Enjoy? but then check out my Meteorite Micrograph Gallery hosted by Meteorite Times. I employ most of the techniques outlined in this article in my various image styles. http://www.meteorite.com/meteorite-gallery/meteorites-alpha_frame.htm Tom Phillips ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
