Geologic Mapping C

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InfiniCuber
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Re: Geologic Mapping C

Postby InfiniCuber » September 25th, 2015, 8:38 pm

What is anyone using for the "geologic compasses"?
Just curious to see what anyone has!
One of these?

Image

Interesting. Well I mean we don't have any—I just found this random image on the internet :lol:
Yep, those are the ones is found on Google xD I don't really know what I would use one for...
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Re: Geologic Mapping C

Postby syo_astro » September 26th, 2015, 8:21 am

Think basic topographic map reading. In the field, how do you literally get your bearings? How do you figure out the strike or dip or whatever of some strata you find? Some get pretty complex and expensive, but there are many uses. Basically think of it as your all around geology ruler I guess.
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Re: Geologic Mapping C

Postby karan_hooda » September 27th, 2015, 8:56 pm

Does anyone know how to prepare for this event? It's my first year doing it and was wondering if someone could point me in the right direction?

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Re: Geologic Mapping C

Postby InfiniCuber » September 27th, 2015, 9:58 pm

Does anyone know how to prepare for this event? It's my first year doing it and was wondering if someone could point me in the right direction?
Firstly, welcome to the Geo Maps squad! :D :D :D
Geo Maps, just like many other study events, is one of those where you have to do the research a lot. The rules gives you broad topics, but it is up to you to research as deep as you can/want to get a better understanding, because anything under those topics on the rules is fair game.
I would start with googling each of the topics on the rules first and familiarizing yourself with that and some general key words. There are plenty of resources online, and wikipedia is your friend! Many colleges have geology info, so look for those! If you have specific questions about a topic, go ahead and ask, most of us here have been doing this for years and can answer or point you to a resource:)
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Re: Geologic Mapping C

Postby Gemma W » September 29th, 2015, 10:39 am

Does anyone know how to tell the difference between a dip-slip fault and a transform fault when reading a super simple geometric map? Aka just a top view (or even with cross sections) with nothing but strata marked. As far as I can tell the two (when eroded to flat) have identical outcrop patterns, but I'm probably missing something...
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Re: Geologic Mapping C

Postby pikachu4919 » September 29th, 2015, 7:14 pm

Does anyone know how to tell the difference between a dip-slip fault and a transform fault when reading a super simple geometric map? Aka just a top view (or even with cross sections) with nothing but strata marked. As far as I can tell the two (when eroded to flat) have identical outcrop patterns, but I'm probably missing something...
Image

They didn't give these markings on the map?
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Re: Geologic Mapping C

Postby Gemma W » September 30th, 2015, 7:15 am

Does anyone know how to tell the difference between a dip-slip fault and a transform fault when reading a super simple geometric map? Aka just a top view (or even with cross sections) with nothing but strata marked. As far as I can tell the two (when eroded to flat) have identical outcrop patterns, but I'm probably missing something...
Image

They didn't give these markings on the map?
No, I was looking at a practice question that asked to identify the fault just from a basic block diagram. So you can see where the fault is, but I don't know how to tell which direction the displacement of the tilted strata was, since I think both would cause the same pattern.
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Re: Geologic Mapping C

Postby InfiniCuber » September 30th, 2015, 6:14 pm

Does anyone know how to tell the difference between a dip-slip fault and a transform fault when reading a super simple geometric map? Aka just a top view (or even with cross sections) with nothing but strata marked. As far as I can tell the two (when eroded to flat) have identical outcrop patterns, but I'm probably missing something...
Image

They didn't give these markings on the map?
No, I was looking at a practice question that asked to identify the fault just from a basic block diagram. So you can see where the fault is, but I don't know how to tell which direction the displacement of the tilted strata was, since I think both would cause the same pattern.
Could you possibly upload a picture of it so we can understand better? :D
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Re: Geologic Mapping C

Postby Magikarpmaster629 » September 30th, 2015, 6:18 pm

No, I was looking at a practice question that asked to identify the fault just from a basic block diagram. So you can see where the fault is, but I don't know how to tell which direction the displacement of the tilted strata was, since I think both would cause the same pattern.
Can you link this problem? If it's giving you a block diagram, you could look at the layers and figure out which direction it's going, but with just a geologic map and no symbols, it would be harder.
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Re: Geologic Mapping C

Postby Gemma W » October 1st, 2015, 9:33 am

The question is part of a random powerpoint that I have, not sure where it came from and not sure how to link just that slide...but the idea was to draw the rest of the block diagram from just the geologic map. But I looked closer and realized there was a tiny dip symbol along the fault, so that answers my question. Still, it's interesting that strike-slip and dip-slip faults cause basically the same outcropping patterns, never thought about that before. Thanks for the feedback, I wouldn't have noticed the fault symbol if I hadn't been reminded of it :)
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