Rocks & Minerals B/C ID/Question Marathon

Test your knowledge of various Science Olympiad events
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asthedeer
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Re: Rocks & Minerals B/C ID/Question Marathon

Post by asthedeer » April 12th, 2014, 4:11 pm

yes you're right!!!!!
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Re: Rocks & Minerals B/C ID/Question Marathon

Post by taylorivy » April 12th, 2014, 7:30 pm

Augite or a less distinct mica schist I think? I suppose if I pick one it's augite

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Re: Rocks & Minerals B/C ID/Question Marathon

Post by sofossils » April 16th, 2014, 5:49 am

For the sake of reviving............
What is Bowen's Reaction Series? What is the continuous branch? What is the discontinuous branch?
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Re: Rocks & Minerals B/C ID/Question Marathon

Post by taylorivy » April 16th, 2014, 6:52 am

sofossils wrote:For the sake of reviving............
What is Bowen's Reaction Series? What is the continuous branch? What is the discontinuous branch?
Bowen's Reaction Series dictates which minerals form from magma at certain temperatures, and thus, what temperature those minerals are most stable at.  The continuous branch shows the shift along the spectrum of sodium-rich plagioclase at high temperatures to calcium-rich plagioclase at lower temperatures.  The discontinuous branch is made up specific minerals that are present as magma reaches certain temperatures.  As magma continues cooling, a mineral reacts with the remaining magma to form the next in the series.  The discontinuous branch is made up of olivine (high temps), pyroxene, amphibole, biotite, orthoclase, muscovite, and quartz (lower temps).

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Re: Rocks & Minerals B/C ID/Question Marathon

Post by sofossils » April 16th, 2014, 12:37 pm

Correct!
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Re: Rocks & Minerals B/C ID/Question Marathon

Post by taylorivy » April 16th, 2014, 1:31 pm

[img]http://upload.wikimedia.org/wikipedia/commons/9/97/Azurite-Malachite-59275.jpg[/img]

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Re: Rocks & Minerals B/C ID/Question Marathon

Post by sofossils » April 16th, 2014, 1:39 pm

Azurite and Malachite, they are both carbonates and ores of copper
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Re: Rocks & Minerals B/C ID/Question Marathon

Post by taylorivy » April 16th, 2014, 1:56 pm

Correct on the ID's. Nearly there with the second part but there's a relationship you're missing.
sofossils wrote:
Azurite and Malachite, they are both carbonates and ores of copper

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Re: Rocks & Minerals B/C ID/Question Marathon

Post by darkdeserthighway » April 16th, 2014, 3:47 pm

taylorivy wrote:
[img]http://upload.wikimedia.org/wikipedia/commons/9/97/Azurite-Malachite-59275.jpg[/img]
When azurite weathers, it is replaced by malachite. (pseudomorph)

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Re: Rocks & Minerals B/C ID/Question Marathon

Post by taylorivy » April 16th, 2014, 4:08 pm

Great! Go right ahead.

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