Rocks and Minerals B/C

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Re: Slate, shale, phyllite

Post by tornado guy » February 5th, 2012, 7:15 am

glaciergary wrote:Slate is harder than shale. You can't necessarily tell by the color. Also, when wet, shale may have an earthy smell. Slate also may have a very slight sine to it, and is often flatter. If you are lucky, the telltale sign would be if shale has any fossils. While slate can have fossils, they would be deformed, and are rare.

Hope this helps.

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Re: Rocks and Minerals B/C

Post by quizbowl » February 17th, 2012, 1:48 pm

Has anyone ever faced questions on the Nickel-Strunz Classification system of minerals?
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Re: Rocks and Minerals B/C

Post by mnstrviola » February 18th, 2012, 11:02 am

This is a question for Awesome Aquifers, but I'd figure it would be better to ask here.

What's a common rock/mineral that has a relatively high porosity but low permeability? It could have lots of pore spaces but they wouldn't be interconnected.

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Re: Rocks and Minerals B/C

Post by quizbowl » February 18th, 2012, 12:15 pm

mnstrviola wrote:This is a question for Awesome Aquifers, but I'd figure it would be better to ask here.

What's a common rock/mineral that has a relatively high porosity but low permeability? It could have lots of pore spaces but they wouldn't be interconnected.
I wouldn't call it exceptionally common, but vesicular basalt fits that description well.
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Re: Rocks and Minerals B/C

Post by hexagonaria » February 18th, 2012, 12:28 pm

quizbowl wrote:
mnstrviola wrote:This is a question for Awesome Aquifers, but I'd figure it would be better to ask here.

What's a common rock/mineral that has a relatively high porosity but low permeability? It could have lots of pore spaces but they wouldn't be interconnected.
I wouldn't call it exceptionally common, but vesicular basalt fits that description well.
I've also heard pumice as the classic example of that. Not that there would ever really be a large underground body of pumice.
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Re: Rocks and Minerals B/C

Post by mnstrviola » February 18th, 2012, 1:34 pm

Okay thanks everyone. I think I'll use pumice as an example.

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Re: Rocks and Minerals B/C

Post by hexagonaria » February 18th, 2012, 8:44 pm

It amazes me how many "crystal healing" websites there are out there. :ugeek:
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Re: Rocks and Minerals B/C

Post by gneissisnice » February 20th, 2012, 7:22 am

hexagonaria wrote:It amazes me how many "crystal healing" websites there are out there. :ugeek:
Yeah, it's kinda depressing.

You just want some info on amethyst, and half the sites are like "amethyst is particularly good for healing troubles of the mind" or whatever.
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Re: Rocks and Minerals B/C

Post by tuftedtitmouse12 » February 20th, 2012, 7:39 am

Lol, healing information that makes you depressed...

Anyways, since there are so much info on crystal healing, do you think there may be a slight chance that some questions we might get on our test will contain some of that?
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Re: Rocks and Minerals B/C

Post by gneissisnice » February 20th, 2012, 4:58 pm

tuftedtitmouse12 wrote:Lol, healing information that makes you depressed...

Anyways, since there are so much info on crystal healing, do you think there may be a slight chance that some questions we might get on our test will contain some of that?
Never. There will never ever be a question about that. Ever.
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Cell Bio: 9th @ reg. 18th @ nats
Remote: 6th @ states 3rd @ Nats
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