Please LIKE and SUBSCRIBE. I also appreciate your continual support of these geology education videos. To do so, click on the "Thanks" button just above (right of Download button) or by going here: www.paypal.com/donate/?hosted_button_id=EWUSLG3GBS5W8 Or: www.buymeacoffee.com/shawnwillsey
I found my first normal fault the other day on a ranch I work for. The mountain I was exploring is a horst and graben structure and I found one of the faults. I also found a cool vein of chalcedony surrounded by common opal that runs through the fault and is pushing the vein out of the surface on the hillside the fault runs up. Another cool thing I discovered about the vein of rock is the chalcedony fluoresces a bright green. Thank you for sharing your knowledge, I'm fascinated by geology and rocks, and I love to go out and try to figure out what the rocks and land are telling me.
Thank you, Shawn, for making a complex subject much easier to understand. I love the diagrams. I will need to revisit this lesson to really get the differences into my head.
I have been working on learning this terminology and this is the most informative explanation I have yet seen. I found the quizzes super helpful too. I got that last one wrong because I was looking at the way you were looking in the picture and forgot that you need to look across the fault to determine direction of strike slip, tricky one! Thank you for sharing your vast knowledge 😊
Excellent. I find your use of props very helpful. I'm a 'put your finger on it and go down' person rather than a 'stick person' person . And the cardboard boxes were genius. All I have to do now is remember it..........
Why is extension "normal" and compression abnormal (i.e. "reverse")? It seems as though there has to be a reason for it. Is it that plate tectonics is driven by slab pull (more than by ridge push, and not just by being carried along with the movement of underlying mantle) so that plates are usually under tension? Is it that continents are built up from below, and then spread out under their own weight? Is it that both compression and extension happen more-or-less equally, but extension leaves faults that wind up where we can see them while compression creates faults that then erode away? -- If you ask which direction the movement along a strike-slip fault went, the answer has to be "do you mean which direction the near side moved (relative to the far side), or which direction the far side moved (relative to the near side)?". So it has to be framed as "which way would you have to turn, in order to follow a surface feature across the fault?".
Clear and easy to understand video with helpful hints for remembering which fault is which. P.S. Love that you're rocking the new "Team Willsey" logo for your channel!
What is the relationship between the faults you described in this video, and faults that exit at continental plate boundaries? Are they of totally separate types, or considered the same as the "smaller" faults seen well inside a continental plate? In the faulst for this video, wuld normal faults be the equivalent of diverging plate boundaries? what about instances where the land just spreads apart leaving a large gap instead of the "normal" type described in this video where the hanging side drops to fill the gap?
In the image for question #4 at 21:10, I'm able to recognize an additional micofault, sitting between the two most right ones that are annotated with arrows. This fault converges with the most right fault in the lower half of the picture.
Brilliant lesson, thank you Shawn! Your props are really helpful, as are the quiz questions (I got 1 wrong this time because I rushed a bit ;) Btw I really like the logos and designs in the merch section of your website! :)
Howdy Shawn. You're a generous teacher. That was a good class. I did well, but I've had lots of practice. Still, I always need a good refresher, so thanks. I use a couple of Jedi mind tricks to remember dips from strikes. Niagra Falls has always helped me remember the term escarpment and normal faulting. I borrow from my memories of living on Miramar Beach a few miles south of where the San Andreas fault heads out to sea for a reminder of how strike-slip faults are setup. You did a terrific video maybe last summer, but maybe 18 months ago. It was a California trip -- did you have a sabbatical year? It was somewhere in that Southern California central desert region and you spent time examining a road cut, or perhaps just a gap in shifting rock mounds displaying all kinds of dramatic faulting. The video featured some very tortured, broken sedimentary rocks, bending in tight arcs. Do you know what I'm taking about? I never got to explore that area much, and the locale didn't register -- maybe you were in Anzo-Boreas, or another California State park? Take care, man -- only 21 shoppings days left. 🧙🏼♂️
The audio wasn't working at the beginning of the video. It turned out my monitor was accidentally muted, so it wasn't your fault! BTW: Could you do a video about the geology of the Book Cliffs of Utah and Colorado?
Off topic, but I really like the sound that comes from this headset mic rather than the current setup with the larger mic, which sounds like it's not plugged in and sound is instead being picked up by the laptop? (kinda echoey). I'll go back to my corner now. Thank you for these vids!
@@kenskiusa one of the compression faults he showed an overhead view of was magnitude 7.3, it would be interesting to see a few more like that where the earthquake magnitude is known.
With GPS (CORS, for example, or I'm sure USGS has stations in geologically interesting areas), can fault movement now be measured absolutely instead of just relatively? I've seen animations and vector maps of the movement in the OR/WA region. The topic (generally across the US or other geologically interesting spots, not just in PNW) might make a good future video.
Professor Willsey you had mentioned in a previous video that you will have merchandise for sale like t-shirts. Will that be available before Christmas?
I'd say show both the actual real diagram pic of a fault and the sandwich, pie, or cake version of same type example of fault. Great learning tool to have with the kids..😂
Thanks Shawn. Very much enjoy your videos and lectures. But I'm having trouble with your audio, it has become very tinny & there is sometimes "sussing", which makes for an uncomfortable sound experience. I will still watch, and learn, and press the LIKE button 👍 but the sound of your lecture videos is becoming progressively worse and unfortunately harder to cope with. Still, sending love from Australia 🌏
Please LIKE and SUBSCRIBE. I also appreciate your continual support of these geology education videos. To do so, click on the "Thanks" button just above (right of Download button) or by going here: www.paypal.com/donate/?hosted_button_id=EWUSLG3GBS5W8 Or: www.buymeacoffee.com/shawnwillsey
Great series for all of us who need to learn the basics ... Thanks! 🤗
I found my first normal fault the other day on a ranch I work for. The mountain I was exploring is a horst and graben structure and I found one of the faults. I also found a cool vein of chalcedony surrounded by common opal that runs through the fault and is pushing the vein out of the surface on the hillside the fault runs up. Another cool thing I discovered about the vein of rock is the chalcedony fluoresces a bright green. Thank you for sharing your knowledge, I'm fascinated by geology and rocks, and I love to go out and try to figure out what the rocks and land are telling me.
Thank you, Shawn, for making a complex subject much easier to understand. I love the diagrams. I will need to revisit this lesson to really get the differences into my head.
Definitely one to watch again.
I have been working on learning this terminology and this is the most informative explanation I have yet seen. I found the quizzes super helpful too. I got that last one wrong because I was looking at the way you were looking in the picture and forgot that you need to look across the fault to determine direction of strike slip, tricky one! Thank you for sharing your vast knowledge 😊
Excellent. I find your use of props very helpful. I'm a 'put your finger on it and go down' person rather than a 'stick person' person . And the cardboard boxes were genius. All I have to do now is remember it..........
Thank you, Shawn, for your ongoing talks!
Thanks for this informative and fun video!
Why is extension "normal" and compression abnormal (i.e. "reverse")? It seems as though there has to be a reason for it. Is it that plate tectonics is driven by slab pull (more than by ridge push, and not just by being carried along with the movement of underlying mantle) so that plates are usually under tension? Is it that continents are built up from below, and then spread out under their own weight? Is it that both compression and extension happen more-or-less equally, but extension leaves faults that wind up where we can see them while compression creates faults that then erode away?
--
If you ask which direction the movement along a strike-slip fault went, the answer has to be "do you mean which direction the near side moved (relative to the far side), or which direction the far side moved (relative to the near side)?". So it has to be framed as "which way would you have to turn, in order to follow a surface feature across the fault?".
These are solid, important classes! Wow. Just what I need Shawn. Thank you very much.
This really helped me understand hanging and foot walls. Thanks, Shawn!
Bedankt
Thanks!
Thank you Shawn. You cleared up a lot of confusion on my part about the footwall and hanging wall. Very enjoyable episode. Loved the quiz questions.
Clear and easy to understand video with helpful hints for remembering which fault is which.
P.S. Love that you're rocking the new "Team Willsey" logo for your channel!
Thanks for all the hard work on these videos!
Great lesson! Thanks Shawn.
What is the relationship between the faults you described in this video, and faults that exit at continental plate boundaries? Are they of totally separate types, or considered the same as the "smaller" faults seen well inside a continental plate?
In the faulst for this video, wuld normal faults be the equivalent of diverging plate boundaries? what about instances where the land just spreads apart leaving a large gap instead of the "normal" type described in this video where the hanging side drops to fill the gap?
I love learning this stuff. Thank you.
I appreciate from your lectures.
Great content, thank you Prof!
In the image for question #4 at 21:10, I'm able to recognize an additional micofault, sitting between the two most right ones that are annotated with arrows. This fault converges with the most right fault in the lower half of the picture.
Yes, good observation
Really clear 😃. Thank you!
Creeks in Carrizo plain California is an excellent example of that and some of those have been offset dramatically
Brilliant lesson, thank you Shawn! Your props are really helpful, as are the quiz questions (I got 1 wrong this time because I rushed a bit ;)
Btw I really like the logos and designs in the merch section of your website! :)
Howdy Shawn. You're a generous teacher. That was a good class. I did well, but I've had lots of practice. Still, I always need a good refresher, so thanks.
I use a couple of Jedi mind tricks to remember dips from strikes. Niagra Falls has always helped me remember the term escarpment and normal faulting. I borrow from my memories of living on Miramar Beach a few miles south of where the San Andreas fault heads out to sea for a reminder of how strike-slip faults are setup.
You did a terrific video maybe last summer, but maybe 18 months ago. It was a California trip -- did you have a sabbatical year? It was somewhere in that Southern California central desert region and you spent time examining a road cut, or perhaps just a gap in shifting rock mounds displaying all kinds of dramatic faulting. The video featured some very tortured, broken sedimentary rocks, bending in tight arcs. Do you know what I'm taking about?
I never got to explore that area much, and the locale didn't register -- maybe you were in Anzo-Boreas, or another California State park?
Take care, man -- only 21 shoppings days left. 🧙🏼♂️
Yikes, I have serious catching up to do!❤ ❤
Thanks Shawn--
The audio wasn't working at the beginning of the video. It turned out my monitor was accidentally muted, so it wasn't your fault! BTW: Could you do a video about the geology of the Book Cliffs of Utah and Colorado?
you explained why many many many mines just stop. the earthquakes. here in california sheered off the vein they were mining. pretty cool. !!
Brilliant got them all right!!! And I’ll play with my sandwich… and ignore the funny looks 😂 thank you shawn
Where did you take that picture of the micro faults?
Wall Street trail at Arches National Park
Nice lecture
Off topic, but I really like the sound that comes from this headset mic rather than the current setup with the larger mic, which sounds like it's not plugged in and sound is instead being picked up by the laptop? (kinda echoey). I'll go back to my corner now. Thank you for these vids!
I am working on it but not a sound engineer so am mostly going with trial and error.
Love it. Now what if you fold that? ❤✌️👍
Great class!
Is there any estimate of the magnitude earthquakes that produce these faults? Thanks in advance.
@@kenskiusa one of the compression faults he showed an overhead view of was magnitude 7.3, it would be interesting to see a few more like that where the earthquake magnitude is known.
Obviously larger quakes produce greater offset so it depends on which fault photo you are referring to.
Great title Shawn! 😂
With GPS (CORS, for example, or I'm sure USGS has stations in geologically interesting areas), can fault movement now be measured absolutely instead of just relatively? I've seen animations and vector maps of the movement in the OR/WA region. The topic (generally across the US or other geologically interesting spots, not just in PNW) might make a good future video.
Yes. But for many faults, we only see the aftermath and so don't know for sure which side moved and by how much.
Professor Willsey you had mentioned in a previous video that you will have merchandise for sale like t-shirts. Will that be available before Christmas?
Yes, we are very close to having these available any day now. Look for a video announcement and keep checking the website: www.willseygeology.com/
A left lateral PB&J. I’m so glad school is still in session.
It is easier for the hanging wall to hang together in a normal fault.
Because there is no hanging involved.
Not a passing score, but I'm thinking that the footwall is the more stable of the two sides and hangingwall is what moves.
A left lateral PB&J.
It's not your fault, nor is it my fault... it's the asphalt. 😃
👑
🤣🤣🤣
I'd say show both the actual real diagram pic of a fault and the sandwich, pie, or cake version of same type example of fault. Great learning tool to have with the kids..😂
Yes. More puns like this!
Bueller! 😂
' though often accused , it was not my fault . '
Thanks Shawn. Very much enjoy your videos and lectures.
But I'm having trouble with your audio,
it has become very tinny & there is sometimes "sussing", which makes for an uncomfortable sound experience.
I will still watch, and learn, and press the LIKE button 👍
but the sound of your lecture videos is becoming progressively worse and unfortunately harder to cope with.
Still, sending love from Australia 🌏
Yes, thanks for this. I am working through this and trying to figure out the problem and a solution. Thanks for your patience.
Stand in the fault and your feet are resting on the footwall and the hanging wall is overhanging your head.
"Buhler?" any one?
It's always my fault! 😂
🤦♀German AI translation of the video title: "Kennen Sie Ihre Fehler?" = "Do you know your errors?"
Anyway, thanks for the short lecture!
I know what I did.
I saw no fault in this video at all.
it aint my fault.
My only real fault is how perfect I am
Willsey's Law: Anything that can happen, has happened.
Thanks!