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Geology Quiz (OQ)

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Elzet
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Re: Geology Quiz (RV)

Unread postby Elzet » Sat Sep 04, 2010 7:46 am

a. No, granite is.

b. Yes, indeed. The difference between basalt and gabbro is that basalt is a fine-grained rock while gabbro is a coarse-grained rock.

c. Yes. It has a uniform grey colour.

d. Yes. The surface of Mars appears to be composed primarily of basalt.

e. Yes. The commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene.
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Re: Geology Quiz (RV)

Unread postby Tom124 » Sun Sep 05, 2010 12:40 am

1. F - it is medium-grained or fine-grained
2. T - yes, itself and gabbro are often classified together because of this.
3. F - Fresh basalt is black or dark grey.
4. T - Olympus Mons is a basaltic shield volcano
5. T - particularly interesting on the tops of lava flows as it is highly vesiculated
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Re: Geology Quiz (RV)

Unread postby Elzet » Wed Sep 08, 2010 9:25 pm

:wall: :wall: This quiz came to a standstill. :huh:
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Re: Geology Quiz (RV)

Unread postby onewithnature » Thu Sep 09, 2010 10:05 am

onewithnature wrote:Which statements are TRUE regarding BASALT:

a. Basalt is a coarse-grained rock.
b. Basalt has a composition similar to gabbro.
c. Basalt is usually pale-grey in colour.
d. The Olympus Mons volcano on the planet Mars is composed of Basalt.
e. Basalt is produced mostly from lava flows?


:redface: Apologies for the delay ...

a. FALSE. Basalt is a fine-grained rock.
b. TRUE. Basalt and Gabbro have similar chemical compositions.
c. FALSE. Although it can sometimes be pale grey, it is usually dark-grey to black.
d. TRUE.
e. TRUE. It is formed from rapidly cooling lava flows on the surface of the earth.
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Re: Geology Quiz (RV)

Unread postby onewithnature » Thu Sep 09, 2010 10:08 am

ET, 4/5 ... thanks for trying. :thumbs_up: :clap:

Tom, 5/5 ... You're IT. :thumbs_up: :clap: :clap:
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Re: Geology Quiz (RV)

Unread postby Tom124 » Thu Sep 09, 2010 11:33 pm

Thanks OWN, I certainly had to broaden my horizons to answer that one.

Put these rock types into order from most common to least common in SA:

Igneous
Metamorphic
Sedimentary

Easy for some....
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Re: Geology Quiz (RV)

Unread postby Elzet » Fri Sep 10, 2010 5:44 am

Tom :clap: :clap: :clap:
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Re: Geology Quiz (RV)

Unread postby onewithnature » Fri Sep 10, 2010 8:21 am

S, I, M?
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Re: Geology Quiz (RV)

Unread postby Sprocky » Fri Sep 10, 2010 8:25 am

I, S, M.

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Re: Geology Quiz (RV)

Unread postby Tom124 » Sun Sep 12, 2010 5:44 pm

No-ones got it quite yet...
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Re: Geology Quiz (RV)

Unread postby onewithnature » Sun Sep 12, 2010 6:01 pm

:hmz:

Okay, got to be S, M , I.
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Re: Geology Quiz (RV)

Unread postby Tom124 » Sun Sep 12, 2010 6:12 pm

:thumbs_up: OWN, you're IT!!
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Re: Geology Quiz (RV)

Unread postby onewithnature » Sun Sep 12, 2010 6:14 pm

That's what research does in place of guesswork! :wink:

BBL with a Q. :thumbs_up:
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Re: Geology Quiz (RV)

Unread postby onewithnature » Fri Sep 24, 2010 1:51 pm

What is the most prized mineral that originates in the Earth's mantle?
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Re: Geology Quiz (RV)

Unread postby pantera leo » Mon Sep 27, 2010 11:59 pm

Taking a wild guess OWN but I'll go with Diamonds!?


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