[meteorite-list] thin section waste?

[MarkF]

JUst want to thank Tom for finding that site. I happened to learn how to 
make thin sections in that lab at WWU using just that equipment.
Professor Hirsh is a great teacher. I'm sorry to say I wasn't able to take 
any of his classes (his 1st year there at WWU was my last). But did help him 
as I worked as a student worker for the geology department.
I'm sure he would be pleased to know that you enjoy his site on thin 
sections (and don't miss his other pages which show pleochroism, just too 
cool!)

Mark Ferguson
----- Original Message ----- 
From: "Tom Knudson" <peregrineflier at npgcable.com>
To: "met list" <meteorite-list at meteoritecentral.com>
Sent: Wednesday, June 08, 2005 7:53 PM
Subject: [meteorite-list] thin section waste?


> Hi List, I know nothing about thin sections or how they are made. So, I 
> went
> to Google like a good boy and read about it.  All the sites I visited said
> the same thing, but gave no explanation. They said you end up with a 
> "chip"
> it is the piece that is clued to the slide.  They say to, take a "chip" 
> 27
> x 46 mm rectangular and 10mm thick epoxy it to the glass then cut off the
> chip as close to the glass as possible leaving just a thin slice attached 
> to
> the glass.
>   Okay, I said in the beginning, I know nothing about thin sections, but
> that seems like a waste of time and material to me!!!  You just wasted 
> 3/4's
> of the material! Why not take a piece 27 x 46mm and 4mm thick and epoxy it
> to the glass and save your self the second cut and 6mm of your material?
> You can call me what you will, but I can not see the reasoning behind the
> waste!  If you are making a lunar thin section, that is an expensive
> proposition!
>
> http://almandine.geol.wwu.edu/other/thinsections/
>
>
> Thanks, Tom
> peregrineflier <><
>
>
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