Geologic Mapping C Question Marathon

[elephantower]

The sedimentary environments: those are parts of the ocean, yes, but there are specific names for the deposition environments (hint: they all end in -form, and have the same name as the sedimentary surfaces underlying them).
The coal bed problem: correct!

[Pupitre]

Oh jeez I missed your question on map symbols as I was scrolling through. Its one of my favorites, a:

Drum Roll Please... (Click to Show Hidden Text)

Boudinage (with attitude of plunge for good measure)! Boudinage occurs when a rigid rock is extended and stretched to break apart its surrounding rock that is less resistant to deformation. The pieces formed are called boudins.

Am I right?

I know I owe you a few questions, I would have posted some but I couldn't think of anything really good in the middle of Spanish class Here's a couple to start though:

1. Give me 2 specific features that indicate the presence of a fault, be as specific as possible! Don't just say displacement of rock. If this isn't clear enough, I apologize.

2. Give a brief magnetic history of the planet Earth (the only question I remember with certainty to be on last year's national test!).

[elephantower]

Noice! I was worried that boudinage question was a bit too hard...how are the sedimentary environments coming?

Tentative Answers (Click to Show Hidden Text)

1. It depends on the information given. If you have stratigraphy information from well logs look for omitted and duplicated layers. If you have a cross-section look for  strata that don't line up or seem to be tilted along a line and imbricate fills/fans, if you have a geologic map look for fault symbols, potential orogenic zones (ie mountains), deformed rocks, oceanic ridges (only for oceans obviously) klippes and fensters (for a reverse fault), and, of course roads mysteriously that stop and start up again 50 feet to the side  :P I'm not really sure what you're looking for, it seems like there are a ton of possible answers.
2. A short magnetic history of the earth? I'm pretty that's no longer on the rules, although it may still fall under basic earth history? Either way, I don't really know what to say, except that the Earth's magnetic axis wobbles, and makes a complete loop around the earth's axis every ~5000 years, it can also go on excursions (fun time for the whole magnetic family!), where it wanders significantly from the geographic pole, or inversions, where the magnetic field reverses, every few thousand years. In the  the last 76 million years, 171 inversions have occurred. 
Magnetic history overlayed on geologic time scale:
[img]http://s29.postimg.org/n8z6hiarb/Screenshot_2014_05_05_at_6_28_49_PM.png[/img]

More questions:
1.
Instead of doing the cross-section and parts c and d, determine the minimum net slip of the fault.
2. What are geoblemes and astroblemes (no google please, just your notes)?
3. Name 2 primary igneous and 2 primary sedimentary structures.
4. What feature of thixotropic clay makes it so dangerous?
Knowledge questions don't seem to faze you, so I gave you a lot more this time around.

[Pupitre]

Noice! I was worried that boudinage question was a bit too hard...how are the sedimentary environments coming?

Tentative Answers (Click to Show Hidden Text)

1. It depends on the information given. If you have stratigraphy information from well logs look for omitted and duplicated layers. If you have a cross-section look for  strata that don't line up or seem to be tilted along a line and imbricate fills/fans, if you have a geologic map look for fault symbols, potential orogenic zones (ie mountains), deformed rocks, oceanic ridges (only for oceans obviously) klippes and fensters (for a reverse fault), and, of course roads mysteriously that stop and start up again 50 feet to the side  :P I'm not really sure what you're looking for, it seems like there are a ton of possible answers.
2. A short magnetic history of the earth? I'm pretty that's no longer on the rules, although it may still fall under basic earth history? Either way, I don't really know what to say, except that the Earth's magnetic axis wobbles, and makes a complete loop around the earth's axis every ~5000 years, it can also go on excursions (fun time for the whole magnetic family!), where it wanders significantly from the geographic pole, or inversions, where the magnetic field reverses, every few thousand years. In the  the last 76 million years, 171 inversions have occurred. 
Magnetic history overlayed on geologic time scale:
[img]http://s29.postimg.org/n8z6hiarb/Screenshot_2014_05_05_at_6_28_49_PM.png[/img]

First of all, I'm sorry for the ambiguity of my first question haha I was just curious to see what you would put down and how many would overlap with my answers. Everything you mentioned certainly has merit, I would only add a few more possibilities: Slickensides, breccia, polishing/grooving of the rocks, and mylonite. Ugh, I really have to get better at finding/making these questions, I feel like I'm doing you a disservice considering the solid ones you're asking

Is it not on the rules? Well that's a relief. I mean, technically UTM's not on the rules but that Pennsylvania test had a decent amount on it so I'm not entirely sure what to expect. Again you are correct

As for the environments, I regret to inform you that I have resorted to google searching as the names you are looking for seem to have evaded the grasp of my research thus far. I haven't found anything other than the four "environments" that I posted but I'll keep looking.

[elephantower]

Those slickensides! I actually can't believe I forgot about them... The three environments are (1) undaform for shallow water overlying the shelf, (2) clinoform for the deeper water overlying the slope, and (3) fondoform for the deepest water covering the bottom of the basin (I might have misspoken and said 4 in my original question, sorry ). They're not really that important, but still worth knowing. How are those next 4 questions coming?

PS: UTM is still (sort-of) covered under point 3a, but I think the heavy preponderance of UTM questions on state tests won't be reflected at nationals, because the Nationals test writers (should) have more familiarity with the rules.

[Pupitre]

Those slickensides! I actually can't believe I forgot about them... The three environments are (1) undaform for shallow water overlying the shelf, (2) clinoform for the deeper water overlying the slope, and (3) fondoform for the deepest water covering the bottom of the basin (I might have misspoken and said 4 in my original question, sorry ). They're not really that important, but still worth knowing. How are those next 4 questions coming?

Ugh you're killing me here Ok. I think I have a couple. By the way, what kind would you like me to give you in the future? Calculation? Identification? Also, have you taken the Wright State Invitational test?

1. What type of folds are depicted in this folding sequence?


2. A fault plane is intersected by two mine drifts. One of the drifts has a plunge of 350/20 and the other has a plunge of 275/32. What is the attitude of the fault plane?

3. Explain what is meant by competence.

4. What are the red structures?

Image (Click to Show Hidden Text)

[img]http://upload.wikimedia.org/wikipedia/commons/7/77/Phacolith.jpg[/img]

I'll probably put up some problems similar to the ones in Geologic Structure and Maps: A Practical Guide but I feel like most people have probably used that before.

[Pupitre]

Noice! I was worried that boudinage question was a bit too hard...how are the sedimentary environments coming?

Tentative Answers (Click to Show Hidden Text)

1. It depends on the information given. If you have stratigraphy information from well logs look for omitted and duplicated layers. If you have a cross-section look for  strata that don't line up or seem to be tilted along a line and imbricate fills/fans, if you have a geologic map look for fault symbols, potential orogenic zones (ie mountains), deformed rocks, oceanic ridges (only for oceans obviously) klippes and fensters (for a reverse fault), and, of course roads mysteriously that stop and start up again 50 feet to the side  :P I'm not really sure what you're looking for, it seems like there are a ton of possible answers.
2. A short magnetic history of the earth? I'm pretty that's no longer on the rules, although it may still fall under basic earth history? Either way, I don't really know what to say, except that the Earth's magnetic axis wobbles, and makes a complete loop around the earth's axis every ~5000 years, it can also go on excursions (fun time for the whole magnetic family!), where it wanders significantly from the geographic pole, or inversions, where the magnetic field reverses, every few thousand years. In the  the last 76 million years, 171 inversions have occurred. 
Magnetic history overlayed on geologic time scale:
[img]http://s29.postimg.org/n8z6hiarb/Screenshot_2014_05_05_at_6_28_49_PM.png[/img]

More questions:
1.
Instead of doing the cross-section and parts c and d, determine the minimum net slip of the fault.
2. What are geoblemes and astroblemes (no google please, just your notes)?
3. Name 2 primary igneous and 2 primary sedimentary structures.
4. What feature of thixotropic clay makes it so dangerous?
Knowledge questions don't seem to faze you, so I gave you a lot more this time around.

1. I'll edit this post with the answer when I get it, my brain hurts right now
2. Going based upon my fairly limited knowledge of etymology and glancing over my whopping one sentence definition of cryptoexplosions, I'm going to say that an astrobleme is a crater caused by an extraterrestrial rock/projectile and a geobleme is a crater caused by a terrestrial rock/projectile. EDIT: My definition of geobleme actually doesn't make a whole lot of sense... idk maybe pressure from within the Earth causes a geobleme? Mind explaining?
3. I'm not entirely sure what this one is asking, but two primary igneous structures could be intrusions and possibly volcanic rock? Or are you looking for more specific types of intrusions? Sedimentary structures could include graded and cross bedding?
4. Thixotropy is the property of a substance to have a lower viscosity when agitated, so if you were to step in thixotropic clay, it would begin to flow and you would begin to sink similar to quicksand?

[elephantower]

No I haven't taken the Wright State Invitational (our team is poor and lives in the Southwest, we can't travel to invies). Could you post it on the Test Exchange if you have it? Also, for problems, I need knowledge and analytical (calculations). My partner is taking care of stereonet and other construction (eg 3-point problem) questions, though, so I'd appreciate a few questions to intimidate him with Also, please no more from the Practical Guide!

answers

time to catch up Pupitre: what doesn't kill you makes you stronger :D (Click to Show Hidden Text)

1. Ptygmatic fold (thanks, binder!)
2. Stereonets! Run! Don't worry I'll ask my partner this one... you can't do this analytically, right?
3. Definitions of competence: 
         1. responding to my other 4 questions
         2. the quality of being resistant to deformation, not ductile
4. Hydrocarbon deposits?

[elephantower]

Oh hey you answered while I answered!

[Pupitre]

No I haven't taken the Wright State Invitational (our team is poor and lives in the Southwest, we can't travel to invies). Could you post it on the Test Exchange if you have it? Also, for problems, I need knowledge and analytical (calculations). My partner is taking care of stereonet and other construction (eg 3-point problem) questions, though, so I'd appreciate a few questions to intimidate him with Also, please no more from the Practical Guide!

answers

time to catch up Pupitre: what doesn't kill you makes you stronger :D (Click to Show Hidden Text)

1. Ptygmatic fold (thanks, binder!)
2. Stereonets! Run! Don't worry I'll ask my partner this one... you can't do this analytically, right?
3. Definitions of competence: 
         1. responding to my other 4 questions
         2. the quality of being resistant to deformation, not ductile
4. Hydrocarbon deposits?

YES I GOT YOU ON THE LAST ONE! Would you like me to tell you? And you can solve it by drawing a diagram with a ruler and protractor as well (number 2). Also, our team as well is dirt poor and we don't go anywhere but someone here was nice enough to send it to me, I'd be happy to do the same for you.