[meteorite-list] Seeking Impact Materials

[Ted Bunch]

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
> 
> 
>       
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