A preview gallery submission: Gneiss, a metamorphic rock.

Articles and images posed here will be included in the PDF and paper version of the magazine (you can also send them by email). All are invited to contribute!
Post Reply
Message
Author
The QCC
Posts: 397
Joined: Sat Oct 11, 2014 10:13 pm

A preview gallery submission: Gneiss, a metamorphic rock.

#1 Post by The QCC » Sun Feb 15, 2015 6:59 pm

MicrobeMag Gneiss_Page_1.jpg
MicrobeMag Gneiss_Page_1.jpg (108.65 KiB) Viewed 13371 times
MicrobeMag Gneiss_Page_2.jpg
MicrobeMag Gneiss_Page_2.jpg (142.97 KiB) Viewed 13371 times
MicrobeMag Gneiss_Page_3.jpg
MicrobeMag Gneiss_Page_3.jpg (136.86 KiB) Viewed 13371 times
MicrobeMag Gneiss_Page_4.jpg
MicrobeMag Gneiss_Page_4.jpg (52.48 KiB) Viewed 13371 times
The document and images have been submitted via email to the editor @ microbehunter.com by CW Hennig.

JimT
Posts: 3247
Joined: Fri Oct 24, 2014 1:57 pm

Re: A preview gallery submission: Gneiss, a metamorphic rock

#2 Post by JimT » Fri Feb 20, 2015 2:23 am

Good sequence, images, and story of gneiss rock. If you haven't yet you should share how you shave them so thin.

The QCC
Posts: 397
Joined: Sat Oct 11, 2014 10:13 pm

Thin section of Gneiss, a metamorphic rock.

#3 Post by The QCC » Fri Feb 20, 2015 2:33 am

I have to admit I use an electric razor.
Oh!
You meant the rocks.

I tried making comminuted samples with very little success. So I bit the bullet and purchased my thin section slides from a supplier in China. They are high quality and 1/3 to 1/5 the cost of slides sold in North America.

JimT
Posts: 3247
Joined: Fri Oct 24, 2014 1:57 pm

Re: A preview gallery submission: Gneiss, a metamorphic rock

#4 Post by JimT » Fri Feb 20, 2015 3:01 am

"Electric razor" :o
Doesn't that dull the blades and hurt your face?
Would chipping a sliver off and rubbing on various grades of emery paper work? I would like to try some.

The QCC
Posts: 397
Joined: Sat Oct 11, 2014 10:13 pm

Re: A preview gallery submission: Gneiss, a metamorphic rock

#5 Post by The QCC » Fri Feb 20, 2015 3:18 am

The process for making thin sections without automated machinery is labour intensive and slow.
To end with a 3um thin slice that is 3um from end to end takes hours of grinding with at least four different grits of emery.
In a nut shell this is what you do.'
Chip off a small piece of rock about 1cm sq.
Grind and polish one surface flat and very smooth.
Glue (clear epoxy cement) the flat side to a glass slide.
Grind and polish the the glued rock to 3um using 200, 400, 800 & 1200 grit emery.
Hint: Take two strips of 3um shim stock and wrap them around the ends of the slide. This acts as thickness gauge

If you do not have the patience of Job, spread the job out over several days.

JimT
Posts: 3247
Joined: Fri Oct 24, 2014 1:57 pm

Re: A preview gallery submission: Gneiss, a metamorphic rock

#6 Post by JimT » Fri Feb 20, 2015 2:56 pm

Thanks for the instructions. Now if I can just locate Job.

billbillt
Posts: 2895
Joined: Mon Nov 10, 2014 10:01 pm

Re: A preview gallery submission: Gneiss, a metamorphic rock.

#7 Post by billbillt » Thu Apr 30, 2015 10:22 pm

Job is in your Bible....

Post Reply