Rocks and Minerals B/C

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quizbowl
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Re: Rocks and Minerals B/C

Postby quizbowl » April 15th, 2012, 10:51 am

Why is there an asterisk next to silver and diamond and gold in the list?
At the bottom of the list is a supply company that you can buy a R&M set from for practice. However, those three are not included (I mean, they're pretty expensive :P )
2010: 5th in NYS
2011: 4th in NYS
2012: 3rd in NYS
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Re: Rocks and Minerals B/C

Postby iYOA » April 22nd, 2012, 1:28 pm

Totally need to get a head start for next year. This year was...bleh. The list shouldn't change much, right?
yeah like at most 1 specimen will be different.
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quizbowl
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Re: Rocks and Minerals B/C

Postby quizbowl » April 22nd, 2012, 1:31 pm

Totally need to get a head start for next year. This year was...bleh. The list shouldn't change much, right?
yeah like at most 1 specimen will be different.
Hrmm, I'm sure that it'll change a bit more that. Looking at the 2006 --> 2008 list had at least a dozen changes overall. Not much, but enough to give some diversity in this event. And to be honest, I really love the rule of addition of new specimens by Event Supervisors - not many events allow for this amount of wiggle room. If I get a chance, I'd definitely love to throw in some tough IDs :D
2010: 5th in NYS
2011: 4th in NYS
2012: 3rd in NYS
<quizbowl> ey kid ya want some shortbread
<EASTstroudsburg13> I don't know why, but I just can't bring myself to delete this post.

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Re: Rocks and Minerals B/C

Postby havendude » April 30th, 2012, 7:32 pm

I was taking a test, and one of the samples was a huge rock. It looked like chunks of red sandstone with calcite veins about 1cm thick separated the pieces. Does anyone have any idea about what it is?
---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 B/C

Postby LoopQuantumGravity » May 1st, 2012, 6:09 pm

I was taking a test, and one of the samples was a huge rock. It looked like chunks of red sandstone with calcite veins about 1cm thick separated the pieces. Does anyone have any idea about what it is?
Pegmatite, maybe. Also, I've seen chunks of gneiss that could look like that. Were the calcite veins parallel?

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Re: Rocks and Minerals B/C

Postby SciBomb97 » May 1st, 2012, 6:29 pm

I was taking a test, and one of the samples was a huge rock. It looked like chunks of red sandstone with calcite veins about 1cm thick separated the pieces. Does anyone have any idea about what it is?
Except for the red sandstone part, that sounds remotely like perthite, although that's not on the list.
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Re: Rocks and Minerals B/C

Postby zimmy1235 » May 2nd, 2012, 12:04 pm

We also took the rocks and minerals test for the PA C division, and thought that was a sample of quartzite (geode?) with orthoclase and then quartz crystals inbetween.

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Re: Rocks and Minerals B/C

Postby havendude » May 3rd, 2012, 12:58 pm

Pegmatite, maybe. Also, I've seen chunks of gneiss that could look like that. Were the calcite veins parallel.
The veins were a bit willy-nilly.
---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 B/C

Postby Paleofreakazoid » May 6th, 2012, 8:09 pm

I've been finding mixed definitions on this––what is Jasper? An opaque chalcedony? An opaque chalcedony with ferric inclusions? A chert?

And if it's debatable, what definition would you use to identify it in competition?
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Re: Rocks and Minerals B/C

Postby gneissisnice » May 9th, 2012, 6:14 am

I've been finding mixed definitions on this––what is Jasper? An opaque chalcedony? An opaque chalcedony with ferric inclusions? A chert?

And if it's debatable, what definition would you use to identify it in competition?
From what I understand, jasper's just a variety of chert. Basically, it's chert that isn't black (that's flint) or white. It's typically red or green.
2009 events:
Fossils: 1st @ reg. 3rd @ states (stupid dinosaurs...) 5th @ nats.
Dynamic: 1st @ reg. 19thish @ states, 18th @ nats
Herpetology (NOT the study of herpes): NA
Enviro Chem: 39th @ states =(
Cell Bio: 9th @ reg. 18th @ nats
Remote: 6th @ states 3rd @ Nats
Ecology: 5th @ Nats


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