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Diamictite and tilllite question
  
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Kara




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PostPosted: Oct 08, 2018 10:54    Post subject: Diamictite and tilllite question  

First four of my diamictite pictures from Finnmark Norway. (pics 1-4)

And then a question: can these slightly different looking specimens from the same area be called diamictite or even tillite too? (pics 5-9)

Thankyou! Kara



1.JPG
 Description:
Bigganjarga tillite, Finnmark Norway
 Viewed:  286 Time(s)

1.JPG



2.JPG
 Description:
Bigganjarga tillite, Finnmark Norway
 Viewed:  283 Time(s)

2.JPG



3.JPG
 Description:
Smalfjord diamictite, Finnmark Norway
 Viewed:  283 Time(s)

3.JPG



4.JPG
 Description:
Smalfjord diamictite, Finnmark Norway
 Viewed:  283 Time(s)

4.JPG



5.jpg
 Description:
Diamictite / tillite?
 Viewed:  283 Time(s)

5.jpg



6.JPG
 Description:
Diamictite / tillite?
 Viewed:  283 Time(s)

6.JPG



7.JPG
 Description:
Diamictite / tillite?
 Viewed:  283 Time(s)

7.JPG



8.jpg
 Description:
Diamictite / tillite?
 Viewed:  285 Time(s)

8.jpg



9.jpg
 Description:
Diamictite / tillite? "Mama, I've lost my lower teeth.."
 Viewed:  284 Time(s)

9.jpg


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Pete Modreski
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PostPosted: Oct 08, 2018 18:04    Post subject: Re: Diamictite and tilllite question  

I would say, one can for sure call this a diamictite, since that term is based on the texture--the pebbles/clasts are not layered/stratufied as they would be in a conglomerate, and the pebbles are randomly distributed and "floating" in the matrix. Now, to conclude that this is a tillite would require other clear evidence of it being glacial, as it could just be debris-flow material, non glacial. But a wide variety of clast rock types (which this seems to have) would argue for it being glacial.
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