Geology for Engineers: Geological Maps 2. Draw a Geological Cross Section with Dipping Layer
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- เผยแพร่เมื่อ 17 ก.พ. 2021
- Learn how to draw a geological cross section and calculate the STRIKE (delta) and DIP DIRECTION (alpha) for a simple geological cross section, parallel to the Dip Direction.
Thanks Joan Martinez those maps you have solved, you have made them clear and well understood hope you solved also those which are still
Thanks for your support!
Thank you sir. I have an exam on tomorrow just got knowledge through this video. Blessing from Srilanka. ❤️ Much appreciated 🙏
thank you very much keep on doing the good work
Thanks alot
I'm a geophysics student at Cairo university
And your video helped me alot
All the support 🖤
Thanks for your support. I wish I had a little bit more of time so I could upload more videos. Let's see if I find the opportunity. Best regards
I'm a student at Middle East Technical University, studying mining engineering. Thank you so much for your help, sir!
Me too😅
@@goksuyildiz9540 finallerinizde başarılar hocam 😅 yorumunuz ilginç derecede keyfilendirdi beni teşekkur ederim
You're welcome!
More understandable thank you
Thank you so much I had a hard time understanding this concept
Hi sir thank you so much for this helpful video
Thank you sir❤
There was a book entitled 'Geology for Engineers' around in the 70's.
What about P in ur cross sectional view??
Hi I don't get how you got the 15mm when you compute the difference of 700 and 400 elevation. Would you mind to elaborate? I don't understand since the camera did not show the scaling you used in the ruler. Thanks!
700-400=300m. The scale is 1:20000, then 1cm=200m, if you have 300m altitude difference, then you have 200m(1cm=10mm)+100m(0.5cm=5mm) therefore 15mm or 1.5cm or 300m.
where can i find the map pdf?
This helped except the fact the video didn’t directly show on the sheet and that was quite stressful. Thanks anyway!
شكرا 🙏💕
thanks very much, but i am wondering why don't use the apparent dip of the layer in the cross section? or how to calculate the apparent dip? thank you very much.
Hi Flora,
I'm happy that you liked the video.
Regarding to your question, in this case you have to use the true dip because the cross section is perpendicular to the layers.
In any other situation, when the cross section is forming an angle different of 90º with the layers or other geological structures, you've to use the apparent dip.
You can learn how to calculate it in this video:
th-cam.com/video/hI_g0TOeVaQ/w-d-xo.html
Best regards
Joan
@@joanmartinezbofill3977 Thank you very much☺
Thank you for this wonderful video sir...please I have a geological map that I am supposed to draw a cross section for it a long a specified line....sectional profile isn't appearing like the way I perceive it...I would be glad if you (or anyone at all) could help me with it...I will send it through email. Thank you in advance.
Hi SiMBA, make sure that the topographical scales are correct. When the topography is not properly drawn, then everything goes wrong. Another very important issue is to correctly calculate and draw the apparent dip in your cross section.
Bro do yoy share your whatsapp number iam from.pakistan and geology student so. I need your help
Hi Sir do you have any documents concerning the lithofacies maping using conventionnal facies triangle , i will be very grateful if you help me , i need to understand how to represente the ratios in the map ... please i am ready to give you my email at any time. best regards
Hi MegaKASPER31,
I supose that you are working with igneous rocks, which are usually classified by using the Strekeisen ternary diagrams, also known as QAPF diagrams.
You should previously identify and classify each type of rock using their essential minerals (quartz, plagioclase, alcali feldspar and feldspathoids). At this point you may need the use of petrographic thin sections.
Then mark the boundaries in the map. Most rocks can appear to look the same when are seen in the field, but when you get a little bit into detail you can see the differences and you'll be able to mark the contact between the different igneous bodies.
Hope you find the answer useful.
Best regards
@@joanmartinezbofill3977 thank you Mr Martinez , unfortuantly no i work with sedimentary rock (Diatomits, Limestones, and Clay) i want to draw a lithofacies maps using a ternary or lithofacies triangle in french (triangle standards des faciès) this my problem i don't know how use this triangle to draw the contour line i know that the fraction 1, 1/2, 1/4, 1/8, and 0 are useful for this study (the zero here mean a 100% of the opposite lithologie .
thank you and regards Mr Joan Martinez Bofill.
The angle and focus of the video recording are very bad
Sorry, you didn't like it. It was done with the best of intentions. I will try to improve it in the future.
Go make yours! You can't even appreciate his efforts