tornado guy wrote:Mica, chemical formula is X2Y4–6Z8O20(OH,F)4 and basically it makes anything shine (toothpaste, paint, lip stick etc..)
NOPE (chuck testa)
Calcite Chemical formula CaCO3
part of marine animal shells
Someone else can upload another photo if I'm right
Re: Rocks and Minerals Question Marathon
Posted: October 26th, 2011, 2:05 pm
by quizbowl
cngu23 wrote:
quizbowl wrote:
tornado guy wrote:Mica, chemical formula is X2Y4–6Z8O20(OH,F)4 and basically it makes anything shine (toothpaste, paint, lip stick etc..)
NOPE (chuck testa)
Calcite Chemical formula CaCO3
part of marine animal shells
Someone else can upload another photo if I'm right
Not too shabby.
I guess for uses, I should have specified them as a commercial ones (construction, acid neutralization, building monuments, even a dietary supplement given to farm animals) but that's fine.
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 4:09 pm
by tornado guy
Identify this specimen and what it is mainly composed of.
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 4:29 pm
by quizbowl
Basalt
plagioclase, pyroxene and some olivine
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 5:44 pm
by tornado guy
quizbowl wrote:
Basalt
plagioclase, pyroxene and some olivine
You have the pagioclase part half correct. But no, it's not basalt.
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 8:13 pm
by Wadhk
Gabbro
Plagioclase, Pyroxene, Amphibole, Olivine
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 8:22 pm
by tornado guy
Wadhk wrote:
Gabbro
Plagioclase, Pyroxene, Amphibole, Olivine
Nope, sorry.
Hint: Igneous rock
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 8:46 pm
by quizbowl
andesite?
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 8:49 pm
by Wadhk
Andesite
Plagioclase, pyroxene
EDIT: beaten by quiz... (ignore this)
Re: Rocks and Minerals Question Marathon
Posted: October 29th, 2011, 8:52 pm
by tornado guy
Hoorah, you both are right! Good job Wadhk for answering the whole question correct! I hand the baton to you.
