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NellsRocks official "What type of Rock" thread
  
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NellsRocks




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PostPosted: Aug 23, 2017 17:08    Post subject: NellsRocks official "What type of Rock" thread  

Hi all

I know this is mainly a mineral forum, but I have so many specimens that are more ROCK than MINERAL, and wonder what some of them really are. So, if it is OK, I have started a thread for my questions!

Let me start with this one:

Found up in the White River Junction area of Vermont. A very bright white... are the dark areas hornblende, or possibly something else?



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NellsRocks




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PostPosted: Aug 23, 2017 17:13    Post subject: Re: NellsRocks official "What type of Rock" thread  

This one was found in the same area as the little one above, in Vermont (USA). As you can see, one end is very similar.


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vic rzonca




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PostPosted: Aug 23, 2017 20:55    Post subject: Re: NellsRocks official "What type of Rock" thread  

There is a decorative stone that is quarried in Ashfield,MA.. It's called Crowsfoot Schist. It has a field of opalescent teal green or sea gray with varying sized bundles of black hornblende crystals (crowsfeet), feldspar, quartz ribbons and occasional cherry colored garnets. The larger of your two pieces seems to be that sort of rock.
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NellsRocks




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PostPosted: Aug 25, 2017 20:55    Post subject: Re: NellsRocks official "What type of Rock" thread  

VIC - I wonder... Do you know if that MA location is served by rail? Both of these were found in the depot/yard area of WRJ, VT. There's a massive pile of dirt/stone/ballast up there that once a year is accessible thanks to their annual Glory Days (of the railroad) event.
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vic rzonca




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PostPosted: Aug 26, 2017 07:11    Post subject: Re: NellsRocks official "What type of Rock" thread  

NellsRocks wrote:
VIC - I wonder... Do you know if that MA location is served by rail? Both of these were found in the depot/yard area of WRJ, VT. There's a massive pile of dirt/stone/ballast up there that once a year is accessible thanks to their annual Glory Days (of the railroad) event.


Road ballast usually isn't transported very far from it's quarry so a better explanation might be a sand pit or quarry that hosts this type of stone that is close by. There probably is a lot of this type of rock around there, but has been exploited in the MA. location to advantage because of the size and form and the fact that they are quarrying in fresh ledge. And, no rail service to the Ashfield quarry, it's a gnarly ride up there.
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PostPosted: Sep 06, 2017 16:40    Post subject: Re: NellsRocks official "What type of Rock" thread  

vic rzonca wrote:
There is a decorative stone that is quarried in Ashfield,MA.. It's called Crowsfoot Schist. ... The larger of your two pieces seems to be that sort of rock.

http://www.ashfieldstone.com/stone-types/crowsfoot/
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NellsRocks




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PostPosted: Sep 11, 2017 09:28    Post subject: Re: NellsRocks official "What type of Rock" thread  

AHA! Thread has been moved! I thought perhaps it was too "rock" and not enough "mineral".

;-)

I have a few new little specimens to share as soon as I can snap some photos.
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