Rocks and Minerals Question Marathon

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hexagonaria
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Re: Rocks and Minerals Question Marathon

Post by hexagonaria »

Haven't done this in a while, so bear with me here...

I think it is bituminous, which has a lower carbon content than anthracite, and a higher carbon content than lignite. Also, bituminous is more economically important than the other types. As far as identification goes, bituminous is a lot shinier and harder than lignite, and softer and duller than anthracite.
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havendude
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Re: Rocks and Minerals Question Marathon

Post by havendude »

Correct. Your turn.
---Regionals---States---Nats

Rocks and Minerals---2nd---15th---11th
Disease Detectives---1st---3rd---27th
Optics---1st---NA---NA
Crime Busters---2nd---NA---NA
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Re: Rocks and Minerals Question Marathon

Post by XJcwolfyX »

http://i.imgur.com/V47cv.jpg
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

Is it Pegmatite?
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2013 Nationals:
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2012 Nationals:
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Re: Rocks and Minerals Question Marathon

Post by havendude »

Granite?
---Regionals---States---Nats

Rocks and Minerals---2nd---15th---11th
Disease Detectives---1st---3rd---27th
Optics---1st---NA---NA
Crime Busters---2nd---NA---NA
Compute This---NA---32---15th
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Re: Rocks and Minerals Question Marathon

Post by XJcwolfyX »

Pegmatite! :D
Your turn!
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 » 

[img]http://www.geoprime.com/mineral/Images/hornblende.jpg[/img]
2014 Nationals:
Heredity (5th) Water Quality (7th)
2013 Nationals:
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Forestry (3) Rocks & minerals (7) Aquifers (13)
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Re: Rocks and Minerals Question Marathon

Post by havendude »

hotchocolate123 wrote:
[img]http://www.geoprime.com/mineral/Images/hornblende.jpg[/img]
It looks like either anthracite or hornblende, but probably the latter.
---Regionals---States---Nats

Rocks and Minerals---2nd---15th---11th
Disease Detectives---1st---3rd---27th
Optics---1st---NA---NA
Crime Busters---2nd---NA---NA
Compute This---NA---32---15th
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Re: Rocks and Minerals Question Marathon

Post by hotchocolate123 »

Hmmm.. It's hornblende :)
Your turn! :D
2014 Nationals:
Heredity (5th) Water Quality (7th)
2013 Nationals:
Forestry (4) Heredity (9) Rocks & Minerals (5)
2012 Nationals:
Forestry (3) Rocks & minerals (7) Aquifers (13)
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Re: Rocks and Minerals Question Marathon

Post by havendude »

Image

Identify
---Regionals---States---Nats

Rocks and Minerals---2nd---15th---11th
Disease Detectives---1st---3rd---27th
Optics---1st---NA---NA
Crime Busters---2nd---NA---NA
Compute This---NA---32---15th
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