Dynamic Planet B/C

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Re: Dynamic Planet B/C

Postby Unome » March 6th, 2017, 5:48 pm

jakool6 wrote:Why are Dynamic tests so loooooooong?

Because you're in Ohio :P
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Re: Dynamic Planet B/C

Postby driedmango » March 7th, 2017, 8:47 am

jakool6 wrote:Why are Dynamic tests so loooooooong?

Ohio has good dynamic tests though!! At least, I like them :D. But I agree haha. Did you take the westlake test? That one was insanely long.
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Northview | Westlake | MIT | Centerville | Solon | Regionals | States | Nats!!
Remote: - | 1 | 2 | 2 | 1 | 3 | 1 | 3 |
Rocks: 7 | - | 3 | 1 | 2 | 1 | 4 | 8 |
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Re: Dynamic Planet B/C

Postby EastStroudsburg13 » March 7th, 2017, 4:43 pm

Sleepy wrote:
freed2003 wrote:Why does the brittle-ductile change occur? From a search it says because fractures become closed, what does this mean?
This is the website http://www.tulane.edu/~sanelson/eens1110/deform.htm

The brittle-ductile transition zone (its proper name) is characterized by a certain depth where the temperature is hot enough to change the rocks from a solid state to a more plastic and fluid state. Above the transition zone where the rocks are colder and more rigid, they break more easily when subjected to stress when compared to rocks below the transition zone where rocks are hotter and plastic enough to where the plastic can be bent/folded more easily.

I think it's saying fractures are closed below the transition zone because the rocks are more fluid and the rock is able to bend so that the fractures are closed within the rock, although I'm not 100% sure... that would be my guess.

EDIT: Sorry Unome, I was typing my answer as you submitted your's so I didn't see your answer, and I don't know how to delete my post. I guess there are 2 answers now!

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Re: Dynamic Planet B/C

Postby freed2003 » March 7th, 2017, 8:55 pm

How come at first the strength of rocks increases?
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Re: Dynamic Planet B/C

Postby Unome » March 8th, 2017, 9:21 am

driedmango wrote:
jakool6 wrote:Why are Dynamic tests so loooooooong?

Ohio has good dynamic tests though!! At least, I like them :D. But I agree haha. Did you take the westlake test? That one was insanely long.

I took it just now; 137/240 (plus or minus 5 I'd say, depending on grading proclivities) in just under 70 minutes, but alone with no notesheets. Apparently good enough for second place (gg Mason's super-high score), though doubtless teams have improved since then. A very difficult test indeed (usually I can solo Dynamic tests in under 40 minutes, so this one was surprisingly long).
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Re: Dynamic Planet B/C

Postby driedmango » March 8th, 2017, 1:16 pm

Unome wrote:I took it just now; 137/240 (plus or minus 5 I'd say, depending on grading proclivities) in just under 70 minutes, but alone with no notesheets. Apparently good enough for second place (gg Mason's super-high score), though doubtless teams have improved since then. A very difficult test indeed (usually I can solo Dynamic tests in under 40 minutes, so this one was surprisingly long).

Oh wow, that score is amazing considering you soloed without notes. My partner and I only got 169.5 (I think?) and that was with cheatsheets and splitting the test. I don't think I could've done that well alone without resources :o
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Remote: - | 1 | 2 | 2 | 1 | 3 | 1 | 3 |
Rocks: 7 | - | 3 | 1 | 2 | 1 | 4 | 8 |
Thermo: 8 | 4 | 4 | - | 7 | 3 | 2 | 11 |
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Re: Dynamic Planet B/C

Postby Abekitt » March 12th, 2017, 7:16 pm

Any chance anybody has some tests I could practice with? Ran out. Also in general I feel like my dynamic score is not up to par to what it should be and it is holding the team back. So I want to improve as much as possible for state. Any books you guys recommend to read, or any things to looks and such? I'll admit my knowledge of this stuff is at a basic level so I want to improve as much as possible.
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Re: Dynamic Planet B/C

Postby Skink » March 12th, 2017, 7:50 pm

Since you're in Illinois, you probably don't need more than an introductory text and/or Wikipedia. The State ES is very clear (and this has been his mission for years) that he's more interested in application of skills to answer geological problems over recall of minutiae. As I expressed a page or two ago, I'm really fond of Plate Tectonics: Continental Drift and Mountain Building, overkill though it may be.

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Re: Dynamic Planet B/C

Postby driedmango » March 12th, 2017, 7:53 pm

Abekitt wrote:Any chance anybody has some tests I could practice with? Ran out. Also in general I feel like my dynamic score is not up to par to what it should be and it is holding the team back. So I want to improve as much as possible for state. Any books you guys recommend to read, or any things to looks and such? I'll admit my knowledge of this stuff is at a basic level so I want to improve as much as possible.

This is one textbook that I really like (written by Fred Vine :o so cool! haha): Global Tectonics. This Cliffsnotes geology page is has more basic information, but it's really comprehensive (has stuff on mass wasting, earthquakes, volcanoes...) and helpful for reviewing. Also Tulane is awesome and put all of their physical geology lecture notes online (here!). Might be overkill but better safe than sorry right? ;)

Good luck at states! Illinois is gonna be competitive this year.
Last edited by EastStroudsburg13 on March 13th, 2017, 1:14 pm, edited 1 time in total.
Reason: URL to textbook removed due to possible violation of copyright
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2017/18 events
Northview | Westlake | MIT | Centerville | Solon | Regionals | States | Nats!!
Remote: - | 1 | 2 | 2 | 1 | 3 | 1 | 3 |
Rocks: 7 | - | 3 | 1 | 2 | 1 | 4 | 8 |
Thermo: 8 | 4 | 4 | - | 7 | 3 | 2 | 11 |
Team: 1 | 1 | 2 | 3 | 1 | 1 | 1 | 2 |

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Re: Dynamic Planet B/C

Postby Abekitt » March 12th, 2017, 9:06 pm

Thanks guys! You guys are insane (in a good way) for being able to read those things. I hope to improve, geology isn't the peak of my interest as I love chemistry and math but people have taken Chem Lab already (although not that well) so I took over this and I hope to improve. Geology is hard and rather boring to me so it's going to be a grind. :)
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Re: Dynamic Planet B/C

Postby Unome » March 14th, 2017, 4:41 pm

Any recommendations on notable orogenies to research? I have the four Appalachian ones, plus seven or eight from the Western US, and I don't really have the time to cover every orogeny in existence (state is in two weeks and I have four other events).
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Re: Dynamic Planet B/C

Postby driedmango » March 15th, 2017, 6:31 am

Unome wrote:Any recommendations on notable orogenies to research? I have the four Appalachian ones, plus seven or eight from the Western US, and I don't really have the time to cover every orogeny in existence (state is in two weeks and I have four other events).

Seems like you already have a pretty comprehensive list. The only ones I've actually seen come up on tests are the appalachian orogenies. Maybe look at the Himalayan orogen? That one seems significant, although I've never been tested on it before.
WE DID IT
2017/18 events
Northview | Westlake | MIT | Centerville | Solon | Regionals | States | Nats!!
Remote: - | 1 | 2 | 2 | 1 | 3 | 1 | 3 |
Rocks: 7 | - | 3 | 1 | 2 | 1 | 4 | 8 |
Thermo: 8 | 4 | 4 | - | 7 | 3 | 2 | 11 |
Team: 1 | 1 | 2 | 3 | 1 | 1 | 1 | 2 |

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Re: Dynamic Planet B/C

Postby appleshake123 » March 15th, 2017, 6:41 am

driedmango wrote:
Unome wrote:Any recommendations on notable orogenies to research? I have the four Appalachian ones, plus seven or eight from the Western US, and I don't really have the time to cover every orogeny in existence (state is in two weeks and I have four other events).

Seems like you already have a pretty comprehensive list. The only ones I've actually seen come up on tests are the appalachian orogenies. Maybe look at the Himalayan orogen? That one seems significant, although I've never been tested on it before.


I've only seen Appalachians and Rockys for in-depth orogenies. The cascade ranges are also pretty common.Here is wikipedia for some orogenies of NA Otherwise, knowing how non-North American structures formed, but not the specific orogenies should suffice for those.
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Re: Dynamic Planet B/C

Postby freed2003 » March 18th, 2017, 12:18 am

How come as rocks go deeper into the EArth's there is a tiny increase in rock strength before the brittle-ductile transition zone? Wouldn't the pressure just make the strength go down.
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Re: Dynamic Planet B/C

Postby Unome » March 18th, 2017, 7:21 am

freed2003 wrote:How come as rocks go deeper into the EArth's there is a tiny increase in rock strength before the brittle-ductile transition zone? Wouldn't the pressure just make the strength go down.

I'm pretty sure the pressure makes the strength go up (until the rock starts deforming after the transition zone) because the density increases; not certain though.
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