Rocks & Minerals B/C 2017

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Magikarpmaster629
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » August 27th, 2016, 5:43 pm

Pretty sure that's Granite, with a granular and phaneritic texture.
Nope; you got the texture right, but not the mineral. Granite has mainly orthoclase, but this has a different kind of feldspar.
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Re: Rocks & Minerals B/C 2017

Postby Raven » August 28th, 2016, 2:10 pm

Pretty sure that's Granite, with a granular and phaneritic texture.
Nope; you got the texture right, but not the mineral. Granite has mainly orthoclase, but this has a different kind of feldspar.
Must be tonalite then.
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » August 28th, 2016, 5:46 pm

Pretty sure that's Granite, with a granular and phaneritic texture.
Nope; you got the texture right, but not the mineral. Granite has mainly orthoclase, but this has a different kind of feldspar.
Must be tonalite then.
Wrong- also not on the list.
It is also known as "salt and pepper" rock, and it has an intermediate composition
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Re: Rocks & Minerals B/C 2017

Postby Raven » August 29th, 2016, 1:39 pm

Nope; you got the texture right, but not the mineral. Granite has mainly orthoclase, but this has a different kind of feldspar.
Must be tonalite then.
Wrong- also not on the list.
It is also known as "salt and pepper" rock, and it has an intermediate composition
I thought Granite was on the list though? (the 2014 list anyways) And I really need to study more.... :oops: hehehe, well that just leaves Diorite I suppose.....
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » August 29th, 2016, 5:56 pm


Must be tonalite then.
Wrong- also not on the list.
It is also known as "salt and pepper" rock, and it has an intermediate composition
I thought Granite was on the list though? (the 2014 list anyways) And I really need to study more.... :oops: hehehe, well that just leaves Diorite I suppose.....
Yay, you did it! I meant that tonalite was not on the list, but granite is (I guess that that was a bit confusing). It's your turn now.
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » September 2nd, 2016, 6:16 pm

Anyone going to post? Or am I the only one doing R&M... :cry:
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Re: Rocks & Minerals B/C 2017

Postby Unome » September 3rd, 2016, 5:06 am

Anyone going to post? Or am I the only one doing R&M... :cry:
I'm doing it, but I know nothing about it.
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Re: Rocks & Minerals B/C 2017

Postby chaguy2457 » September 3rd, 2016, 9:09 pm

The official list for 2017 is up, meaning we can now post with confidence that we're ralking about the right ones! And I can join too.

https://www.soinc.org/sites/default/fil ... lsList.pdf
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Re: Rocks & Minerals B/C 2017

Postby Magikarpmaster629 » September 4th, 2016, 11:28 am

The official list for 2017 is up, meaning we can now post with confidence that we're ralking about the right ones! And I can join too.

https://www.soinc.org/sites/default/fil ... lsList.pdf
Looks like the list is exactly the same as in 2014, other than how it's organized (class vs. alphabet) and the species available at nationals.
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Re: Rocks & Minerals B/C 2017

Postby John Richardsim » September 4th, 2016, 4:02 pm

Identify:
[img]http://www.mindat.org/hpthumbs/HP_45292_800_602.jpg[/img]
[img]http://woodshole.er.usgs.gov/staffpages/boldale/pebbles/images/fig1_400.jpg[/img]
[img]http://www.mindat.org/hpthumbs/HP_180601_318_424.jpg[/img]
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