[meteorite-list] Seeking Impact Materials
From: Ted Bunch <tbear1_at_meteoritecentral.com>
Date: Tue, 18 Jan 2011 19:20:56 -0700 Message-ID: <C95B9899.16817%tbear1_at_cableone.net> You ask a lot - there are good impactites offered at the Tucson show and on the internet. If you collected in the Raton Pass/ S of Trinidad road cuts along the Interstate or outlier sites from the Interstate in the region, I hope you had a knowledgeable field guide with you. Most of these exposures are slumped over. If you collected elsewhere in the region at a "clean" site, the "fireball layer" is difficult to resolve even if you are a trained geologist and even then, it is a ball buster to recognize the K/T layer. Clay layer look-a likes are intercalated with thinly bedded carbonaceous shales and coal seams and this sequence is typically meters thick on either side of the boundary. Good luck, Ted Bunch On 1/18/11 5:42 PM, "Robert Beauford" <robertbeauford at rocketmail.com> wrote: > Dear friends, > I would like to put together an educational collection of impact materials. I > need examples of a variety of impactites. I've got tektites and moldavite, > but would like partial melts, highly shocked materials, breccias, suevites, > and so on, with their crater of origin (and preferably location in relation to > the crater). I particularly need materials that will show microscopic shock > alteration features in thin section. I recently collected a quantity of > really nice coherent samples of KT boundary material from the legendary > outcrops near Trinidad, in Southern Colorado, and would be happy to send a > provenanced piece of this, along with my sincere thanks, to anyone that is > willing to send me nice, labeled materials that I can use. > > Please reply off list, and I will supply my personal mailing address and get > yours (if you are interested in the KT material in return). > Thank you, in advance, for your assistance. > -Robert Beauford > > > > ______________________________________________ > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > Meteorite-list at meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list Received on Tue 18 Jan 2011 09:20:56 PM PST |
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