Thanks very much for putting up such a good and amazing work. I wish there is a way that you could teach me better on structural geology,or at least explain some problems I am facing in the classroom.
Hello, firstly, thanks a lot for you explanation, it’s really god and helpful, but in the final part, the dip direction is perpendicular to the direction of strike, therefore, in this map, the dip direction needs to be NW or SE , because the direction of strike is NE. If you wanna understand better, you can represent the Structural data in a cross(+), and you can see that it’s imposible to represent NE strike with an E dip because they are not perpendicular..
Im' sorry but i still not understand how you find the horizontal distance between the lines. And how would you apply it to the other boundaries (AB, BC, DE and EF)?
Hey! It's the same process seen in the video. Measure the scale in the upper right corner of the map with your ruler. Let's say "x" is the value you got after measuring. So x centimeters is equivalent to 500 meters in the field. Then measure with your ruler the distance between the 2 strike lines. Let's call that value "y" So apply some basic math: x cm ----- 500m y cm ----- distance between the strike (in the field) Distance between strike lines = (y × 500)/x
The strata on the right side of the map dip east and the strata on the left side of the map dip west. Try to imagine an anticline but where sections have been eroded to expose deeper layers.
Thanks a lot for sharing the map drawing skill! I know that a structural contour is a line that connects points with equal elevation. But what troubles me is that, for example, there are more than 2 non-colinear points for the contact between Rock 1 and Rock 2 at 700m height. So how can I know which two points should I connect? I can have 3 combinations!! I also know that I can use the Law of V to roughly identify the strike of the contact, but what if the law of V cannot apply. How can I solve the problem? Thanks a lot
I think I need a bit of help understanding your question. For the 700 m contour, there's one point of contact between B and C, and one or two between C and D. Those are different units so the points of contact don't have to be colinear. Also, in nature (or on any geologic map), strike lines aren't perfectly parallel and you have to use your experience in the field looking at the rocks to best inform your decisions. This is because local or regional scale folds and faults can offset or bends the beds. For example, if you had an arrangement that required you to draw two parallel 700 m strike lines- you might have a fault or a fold.
@@kc_structuralgeology6992 Sorry for that. What I mean is just a scenario. The scenario is that there are more than 2 non colinear point for the contact between two rock units at a specific height, let say 700m. So how I can know which two points should I connect to make the structural contour?
@@tombear4597 I see! That means that that unit does not have a constant dip. Imagine a unit that is folded into a dome shape. The map pattern for an outcropping unit would be a circle, with an infinite number of non-colinear points. More typically, you just have subtle changes in dip or underlying structure that makes points non-colinear. If you are working from a geologic map, make your decision based on other structures mapped nearby OR on any available strike and dips nearby. Ex. If there's an anticline hinge marked on the map, then choose the contacts on only one side of the fold hinge.
Thank you! Your explanation is so much more clear and concise than my textbook's!
Wow, this is a great tutorial! Thank you so much!
Takes me back to 'A' level Geology in 1972...thanks for posting :)
great job indeed.. highly appreciated Dr. Crane
Thank a lot for uploading this, I'm really find this really insightful for geological students 👍🏻
Thank you very much 🌹🌹
From Iraq🇮🇶
This was so useful! Thank you! :)
This was so so helpful thank you!!
I've seen a few methods before but this is the most graphical and easy to understand illustration I've seen. Thanks alot.
You're very welcome!
So well explained!!
This was really great! Specially on these pandemic online schooling times
awsome video! thanks so much
Thanks very much for putting up such a good and amazing work. I wish there is a way that you could teach me better on structural geology,or at least explain some problems I am facing in the classroom.
This was super helpful!! Can you explain how to measure the thickness or minimum thickness of the beds?
Great video 👍👌
thank you thank you thank you!! hope the best for my quiz!
Hi this has been super helpful. Just wondering how to work out true thickness in this example? Like of B or C.
Excelente!
You go girl!
indicate on that map inlier and outllier?
Thanks a lot
thank you ma'am
Whats the name of the book you took that map from
i really need it
Hello, firstly, thanks a lot for you explanation, it’s really god and helpful, but in the final part, the dip direction is perpendicular to the direction of strike, therefore, in this map, the dip direction needs to be NW or SE , because the direction of strike is NE. If you wanna understand better, you can represent the Structural data in a cross(+), and you can see that it’s imposible to represent NE strike with an E dip because they are not perpendicular..
Im' sorry but i still not understand how you find the horizontal distance between the lines. And how would you apply it to the other boundaries (AB, BC, DE and EF)?
Tnx u mam
THANKS
Thanks
Is this a folded structure????
i used the same map. but i dont know how to get the horizontal disance cause i used the cm ruler please help
Hey! It's the same process seen in the video.
Measure the scale in the upper right corner of the map with your ruler. Let's say "x" is the value you got after measuring. So x centimeters is equivalent to 500 meters in the field.
Then measure with your ruler the distance between the 2 strike lines. Let's call that value "y"
So apply some basic math:
x cm ----- 500m
y cm ----- distance between the strike (in the field)
Distance between strike lines =
(y × 500)/x
I want the book u get this maps from
so the inclined strata dip toward the?
The strata on the right side of the map dip east and the strata on the left side of the map dip west. Try to imagine an anticline but where sections have been eroded to expose deeper layers.
Thanks anw....It's a great tutorial, could you please provide the pdf of the paper? So we can download it then practice at home :)
garindia grandis this is where I found it: images.app.goo.gl/3e6NHGBYcLcQtt158
Thanks a lot for sharing the map drawing skill! I know that a structural contour is a line that connects points with equal elevation. But what troubles me is that, for example, there are more than 2 non-colinear points for the contact between Rock 1 and Rock 2 at 700m height. So how can I know which two points should I connect? I can have 3 combinations!! I also know that I can use the Law of V to roughly identify the strike of the contact, but what if the law of V cannot apply. How can I solve the problem? Thanks a lot
I think I need a bit of help understanding your question. For the 700 m contour, there's one point of contact between B and C, and one or two between C and D. Those are different units so the points of contact don't have to be colinear. Also, in nature (or on any geologic map), strike lines aren't perfectly parallel and you have to use your experience in the field looking at the rocks to best inform your decisions. This is because local or regional scale folds and faults can offset or bends the beds. For example, if you had an arrangement that required you to draw two parallel 700 m strike lines- you might have a fault or a fold.
@@kc_structuralgeology6992
Sorry for that. What I mean is just a scenario. The scenario is that there are more than 2 non colinear point for the contact between two rock units at a specific height, let say 700m. So how I can know which two points should I connect to make the structural contour?
@@tombear4597 I see! That means that that unit does not have a constant dip. Imagine a unit that is folded into a dome shape. The map pattern for an outcropping unit would be a circle, with an infinite number of non-colinear points. More typically, you just have subtle changes in dip or underlying structure that makes points non-colinear. If you are working from a geologic map, make your decision based on other structures mapped nearby OR on any available strike and dips nearby. Ex. If there's an anticline hinge marked on the map, then choose the contacts on only one side of the fold hinge.
What of geological bed B?
It's Claystone
500-38
Ma please can you give me a summary about the video 🙏🙏
what exactly is a springline
Do you mean strike line?
please USE METERS
She did, she converted inches to meters in the video…
Why do you have hair on your hand ma'm that's disturbing. Thanks for the explanation tho was really helpfull !
Hair is a consequence of being a mammal. Although maybe it's just a disguise and I'm actually one of the lizard people. You'll never know muahahahaha.
@@kc_structuralgeology6992 hahaha thank you again for the video I took my test last week and got the full mark !
Bruh are you mad? Go get yourself checked for thinking such a way