[Rockhounds] fun with mystery photo & KT Boundary

[John Jaszczak]

New England Meteoritical Services has several KT Boundary specimens for sale at
http://www.meteorlab.com/METEORLAB2001dev/ktimpacta.htm

John

On Mon, Dec 29, 2008 at 15:14, Alan Silverstein <ajs at frii.com> wrote:

> > Would anyone in the Group know of or have ideas on how to get a sample
> > (preferably a core sample) of the KT Boundary?
>
> I've wondered that myself, I would like that too.  Well what might not
> be apparent from the images is that there's a flat area (bench) between
> the levels of the roadcut.  The K/T line is about 3-4' down from this
> point, just a guess, I didn't measure, but when standing on the loose
> hillside at about eye-level with the bench, the line was about at my
> knee level.  The bench is 10-15' deep I would guess...  Wide enough for
> elk to stroll along it, judging from the tracks in the snow, and the
> droppings.
>
> So there's room up there to operate a gas-powered core drilling machine,
> and it's not far down to paydirt either.  I know that major core
> drilling is done "off-grid", gas/diesel-powered, but how small a rig
> exists for this purpose?  Is there something 1-2 people could carry up
> the hill?  Can it be rented?  :-)
>
> Also, talking with a geologist friend who reads core samples (among
> other tasks) for a living, I learned that quite often there are missing
> sections that just don't come to the surface intact because they are so
> "incompetent".  On the other hand, I know that the "Denver Basin
> Project" a few years ago reported on long stretches of sand or pebbles,
> so there must be some method for coring/reading loose material too.
>
> And I bet there are some readers here who can educate us about this.  :-)
>
> On my previous visit years ago I think I brought a length of 3/4"
> diameter copper tubing sharpened on one end, which I've used
> successfully to core apples.  :-)  I played with exposing a flat surface
> several inches up (above the lignite) and trying to get a core sample,
> but of course without grinding through it, it was hopeless.  The material
> is brittle.
>
> Cheers,
> Alan Silverstein
> --
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-- 

""It often seems to me that the night is much more alive and richly colored
than the day."

                      Vincent van Gogh
J Bryan Krämer
North Florida, USA
photos at:
http://pbase.com/photoburner


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