Page 11 of 18

Re: Rocks and Minerals B/C

Posted: January 21st, 2018, 2:33 pm
by dxu46
Image
1. Identify
2. Crystal system
3. Does this specimen react with HCl?
4. Which mineral is at the other end of a solid solution series with this specimen?
1. Calcite?
2. Hexagonal
3. Yes
4. Dolomite?

Re: Rocks and Minerals B/C

Posted: January 21st, 2018, 2:40 pm
by ScottMaurer19
Image
1. Identify
2. Crystal system
3. Does this specimen react with HCl?
4. Which mineral is at the other end of a solid solution series with this specimen?
1. Calcite?
2. Hexagonal
3. Yes
4. Dolomite?
All are correct

Re: Rocks and Minerals B/C

Posted: January 24th, 2018, 6:31 pm
by dxu46
General knowledge questions
1. What is the difference between continuous and discontinuous when it comes to the Bowen's Reaction Series?
2. Define isometric.
3. What is the hardness of your fingernail?
4. What are elements commonly found in Mafic Igneous rocks?  Felsic?
5. Why are properties like streak and density unorthodox ways to identify rocks?

Re: Rocks and Minerals B/C

Posted: January 29th, 2018, 7:57 am
by kate!
General knowledge questions
1. What is the difference between continuous and discontinuous when it comes to the Bowen's Reaction Series?
2. Define isometric.
3. What is the hardness of your fingernail?
4. What are elements commonly found in Mafic Igneous rocks?  Felsic?
5. Why are properties like streak and density unorthodox ways to identify rocks?
1. Continuous means the evolution of plagioclase feldspar from being calcium-rich to sodium-rich. Discontinuous means the formation of mafic minerals like olivine, pyroxene, biotite mica, and amphibole
2. Isometric is the cubic crystal system.
3. 2.5
4. Mafic= iron (Fe) and magnesium (Mg) Felsic= aluminum (Al) and silicon (Si)
5. Properties like streak and density aren't usually used to classify rocks because of how common they are between each kind of rock. Instead, we use texture to classify them because each rock has a different texture.

Re: Rocks and Minerals B/C

Posted: January 29th, 2018, 5:18 pm
by dxu46
General knowledge questions
1. What is the difference between continuous and discontinuous when it comes to the Bowen's Reaction Series?
2. Define isometric.
3. What is the hardness of your fingernail?
4. What are elements commonly found in Mafic Igneous rocks?  Felsic?
5. Why are properties like streak and density unorthodox ways to identify rocks?
1. Continuous means the evolution of plagioclase feldspar from being calcium-rich to sodium-rich. Discontinuous means the formation of mafic minerals like olivine, pyroxene, biotite mica, and amphibole
2. Isometric is the cubic crystal system.
3. 2.5
4. Mafic= iron (Fe) and magnesium (Mg) Felsic= aluminum (Al) and silicon (Si)
5. Properties like streak and density aren't usually used to classify rocks because of how common they are between each kind of rock. Instead, we use texture to classify them because each rock has a different texture.
#1 is almost directly copied from this, but correct, your turn.

Re: Rocks and Minerals B/C

Posted: January 30th, 2018, 9:40 am
by kate!
General knowledge questions
1. What is the difference between continuous and discontinuous when it comes to the Bowen's Reaction Series?
2. Define isometric.
3. What is the hardness of your fingernail?
4. What are elements commonly found in Mafic Igneous rocks?  Felsic?
5. Why are properties like streak and density unorthodox ways to identify rocks?
1. Continuous means the evolution of plagioclase feldspar from being calcium-rich to sodium-rich. Discontinuous means the formation of mafic minerals like olivine, pyroxene, biotite mica, and amphibole
2. Isometric is the cubic crystal system.
3. 2.5
4. Mafic= iron (Fe) and magnesium (Mg) Felsic= aluminum (Al) and silicon (Si)
5. Properties like streak and density aren't usually used to classify rocks because of how common they are between each kind of rock. Instead, we use texture to classify them because each rock has a different texture.
#1 is almost directly copied from this, but correct, your turn.
I didn't really understand so I looked it up and I couldn't figure out how to word it differently from the website because the answer was right. I guess that is cheating, sorry.

Also here are new questions
[img]http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/4PorphyriticFinez/AndesiteHblPorph.jpg[/img]
1. What rock is this?
2. Describe its texture.
3. Why does this texture occur?
4. What rock is this rock most similar to?

Re: Rocks and Minerals B/C

Posted: February 2nd, 2018, 3:55 pm
by dxu46
[img]http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/4PorphyriticFinez/AndesiteHblPorph.jpg[/img]
1. What rock is this?
2. Describe its texture.
3. Why does this texture occur?
4. What rock is this rock most similar to?
1. Andesite
2. Porphyritic/Medium Grained
3. Magma cools slowly then rapidly, forming crystals of different sizes.
4. In composition? Diorite -- it is the plutonic version of Andesite.

Re: Rocks and Minerals B/C

Posted: February 2nd, 2018, 6:46 pm
by pb5754[]
<Deleted>

Re: Rocks and Minerals B/C

Posted: February 3rd, 2018, 2:59 pm
by kate!
[img]http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/4PorphyriticFinez/AndesiteHblPorph.jpg[/img]
1. What rock is this?
2. Describe its texture.
3. Why does this texture occur?
4. What rock is this rock most similar to?
1. Andesite
2. Porphyritic/Medium Grained
3. Magma cools slowly then rapidly, forming crystals of different sizes.
4. In composition? Diorite -- it is the plutonic version of Andesite.
Good job. Your turn!

Re: Rocks and Minerals B/C

Posted: February 3rd, 2018, 4:58 pm
by dxu46
[img]http://www.johnbetts-fineminerals.com/jhbnyc/mineralmuseum/13512det.jpg[/img]
1. What mineral is this?
2. What is it's cleavage angle?
3. This mineral occurs in what type(s) of rock?  Be as specific as you can.
4. How did this mineral get it's name?
5. What would an iron-rich variety of this mineral be called? What about magnesium?

Credit to [url]https://random.org[/url] for helping me decide on a mineral to write a question on!