Rocks & Minerals B/C 2017

[Magikarpmaster629]

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.

[Raven]

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.

[Magikarpmaster629]

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.

Hint (Click to Show Hidden Text)

It is also known as "salt and pepper" rock, and it has an intermediate composition

[Raven]

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.

Hint (Click to Show Hidden Text)

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.... hehehe, well that just leaves Diorite I suppose.....

[Magikarpmaster629]

Must be tonalite then.

Wrong- also not on the list.

Hint (Click to Show Hidden Text)

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.... 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.

[Magikarpmaster629]

Anyone going to post? Or am I the only one doing R&M...

[Unome]

Anyone going to post? Or am I the only one doing R&M...

I'm doing it, but I know nothing about it.

[chaguy2457]

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

[Magikarpmaster629]

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.

[John Richardsim]

Identify:

1 (Click to Show Hidden Text)

[img]http://www.mindat.org/hpthumbs/HP_45292_800_602.jpg[/img]

2 (Click to Show Hidden Text)

[img]http://woodshole.er.usgs.gov/staffpages/boldale/pebbles/images/fig1_400.jpg[/img]

3 (Click to Show Hidden Text)

[img]http://www.mindat.org/hpthumbs/HP_180601_318_424.jpg[/img]