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
Thank you for another educational episode, Shawn. I'm taking is slowly so I absorb the new terminology that I've never heard before. I did get all the questions correct, so you are keeping my brain in good health and working well.
Thank you for doing this! I live in the driftless region, and I’ve never understood my curiosity about the rock and hill we have here! Your lessons have illuminating the history with every episode! Thank you
Excellent episode, very enlightening! Thank you, Shawn :) I recognized Siccar Point, in Scotland, and Praia do Telheiro, near Sagres in Algarve, Portugal. These are fantastic angular unconformities!
My eyes glaze over when I watch rock identification. I can't keep all the nomenclature in my head. Is there some sort of rock decision tree out there? Like the tree identification books that ask "is it this? or this? go to page ..."
These videos are extremely helpful. I see myself and the rest of the team very lucky students to have access to these quality lessons. Can't thankyou enough 🌍🌏🌎🌒🦉
I found out that James Hutton actually figured all this out and found his prime example at Siccar Point way back in the 1700's not 1800's! He didn't even live to see the 1800's. It took almost another century before Lyell promoted his ideas in the 1800's and made them more widely known and even then they were very controversial. Hutton had realized way back in the 1700's from reading the rocks that the amount of time reflected in their layering and deposition (and even that they WERE deposited by natural processes) meant that the Earth was unfathomably older than had been assumed from the Biblical account of creation. People's minds were blown, at least his compatriots who saw and understood the evidence he found! Thanks for the series, the fun quizzes and great illustrations. I have been trying to learn about geology and the mindblowing past ages of the Earth the last few years, and need a lot of review. Info flows in through one neuron and then out (or into a black hole) through another...
Perfectly timed video, Shaun. I’ve just spent the day exploring in the North West Highlands Geopark which included stopping by at Knockan Crag to view the Moine Thrust which is itself I guess an unconformity of sorts?
What would happen if the metamorphic rock still has preserved the stratification and you can see the unconformity cuts it at an angle? Would it still be a nonconformity?
Thank you! Why are fault breaks so clean? That first illustration showed clean fault breaks 10’s of feet long, and not even vertical or parallel to each other. Why did that section of earth fault away to below the other? Does that fault only occur in sedimentary layers?
Before I begin to sound like a nit-picker and a complainer, let me say that this is some of the best content on the internet. Shawn’s focus on and mastery of the subject matter and his ability to get the point across to students is without equal. I am finally able to learn GEO in a better way than I should have done when I first took an elective course in it in college. Sadly, I took the course concurrently to taking some of my most challenging advanced level accounting courses, and when push came to shove, I had to give priority to my accounting courses. Now I am able to learn what I missed. Thank you Shawn! That said, am I the only one hearing a ringing in the audio? It’s very distracting once you hear it. I’m willing to bet donuts it’s due to the cheap headset microphone. Shawn, I urge you to find a better solution. It would be such a shame to forever ruin what is otherwise a treasure of work by using sun-standard recording equipment. The archive Gods are sad. 😢
@@shawnwillsey It's quite possible but I think unlikely that my sound system is compromised, or that I've developed super-hearing from years of sitting in front of high end audio equipment. The other valid option is that you are correct, sir. In any case, I applaud you for being one of the few content creators who actually READS his comments and TAKES IMMEDIATE action to address them. That's a rare quality. I've watched a couple of your videos since this one with the audio anomaly and as far as I'm concerned, the audio sounds great now. Thanks again, professor.
@@mtcynthus I think it should read 1, 2, 5, & 6 In the "Subsidence & Deposition of rocks" column. If it's not in the first column "Deposition of rocks" it should not be in the third column "Subsidence & Deposition of rocks". What am I missing? Help Shawn. Great video.
The bit of OCD in me just *needs* to know what happened to layer "5" at 8:10, layers "D" & "E" at 9:20, and layers "L", "M", "N", and "O" at 11:30 ! I think that the thing that I have the hardest time with in this subject area are the labels that geologists use for the various use for things and trying to remember which is, for example, a disconformity and which is a nonconformity. I can remember the three type, but just not the labels that go with each (apart from the obvious "angular unconformity"!) Any hints on remembering which is which? Am I just missing some logic which explains which is "Dis-" and which is "Non-"?
Conforming means that the layers are consistent with one another. A dis-conformity happens when the layers look like they are conforming (the tilt of the layers is consistent) but in reality they weren't deposited one after the other, there's a time gap in between. Non-conformity is when the rocks below don't conform at all. The contact is very irregular
When James Hutton discovered Siccer Point's unconformity, the conventional wisdom was that Earth was 5000 years old. He used his observation to assert the world was much older, but it couldn't be proven for another 100 years when carbon dating was available. How did he know what he saw at Siccer Point would take more than 5000 years? It seems like there is an unconformity in his thinking. What was his logic?
Shawn, let's consider some places on earth. (1) the Swiss alps (2) the Mediterranean sea (3) the Sahara desert (by the way, these three places are less than 1,000 miles apart) also (4) the Mariana trench (5) Papua (these places are less than 1,000 miles apart) and lastly (6) Iceland. Let's say these places all got buried at the same time; earth gets destroyed. Now, i don't believe in space aliens, but let's say they exist and visited earth after it was destroyed, and, let's say some of the aliens were geologists 🙂 and they did not have a history book of earth. Do they dig into the Icelandic layer, notice that it is igneous rock, and conclude that it is the oldest rock because planets are igneous before sediments form? Do they dig into the Mariana trench layer and conclude (based on weird looking fossils of sea creatures and the fact that it is the lowest layer) that it is the oldest? Do they dig into the Mediterranean layer, noticing that a bit north and stratigraphically higher are deer fossils, and, a bit south are camel fossils...well, which do they conclude is oldest? Shawn, may i suggest to you that geo-layers, in the earth, may be, not so much geo-ages but geo-environments? Our core beliefs guide our interpretation of the evidence. If our core beliefs are wrong we may be way off in our conclusions. Thankfully, we have the history book of the earth...The Holy Bible. Granted, It Does not Speak on every detail. Thanks for listening.
When geologists say the rock at the bottom is older, they are talking about the stratigraphic column, not necessarily the topography. Sometimes the oldest rocks get pushed up and become high topographical points. But they remain at the bottom of the stratigraphic column
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
Thanks Shawn. You have a ringing echo on your audio.
"I've seen it on a T-shirt, so it must be true!" Oh, I love the subtle humor.
"I saw it on the Internet that it is on a T-Shirt" - does that make it 200% true?
@@timpointing No, but laughable.
When I was studying geology in college this was confusing. You have made it simple. I actually got every answer right! Thank you!
Coffee Treat for the Ms. Willsey.
Many thanks for your kind support.
Thank you for another educational episode, Shawn. I'm taking is slowly so I absorb the new terminology that I've never heard before. I did get all the questions correct, so you are keeping my brain in good health and working well.
Thank you for doing this! I live in the driftless region, and I’ve never understood my curiosity about the rock and hill we have here! Your lessons have illuminating the history with every episode! Thank you
Excellent episode, very enlightening! Thank you, Shawn :) I recognized Siccar Point, in Scotland, and Praia do Telheiro, near Sagres in Algarve, Portugal. These are fantastic angular unconformities!
Thank you Shawn. I learned a lot with this episode. Much appreciated. Looking forward to your next episode in the series.
4 for 5, the photos of the types of "uncomformities" are great. Shawn you really hit your mark choosing geology as THE field of study.
Thanks for all the hard work on these videos!
10 out of 10 Shawn, one of your best! Thanks.
What a great way to start my day.
I gotta say that I actually chuckled out loud on "geo-logic". Ha. These sessions are so educational.
Very interesting lesson & beautiful geological features. Thanks!
Another great episode, and once again the combination of detailed explanation and visual aids make it memorable! Thanks, Professor!😊
Thanks!
I love this video, feel like I’m back in College, and I’m 81. So informative. 😊
Thank you another great video always look forward to them great information 😊
My eyes glaze over when I watch rock identification. I can't keep all the nomenclature in my head.
Is there some sort of rock decision tree out there? Like the tree identification books that ask "is it this? or this? go to page ..."
Had to watch it twice but I think I got it!
That's some serious Schist. 🤣
For real though thank you Shawn for the video! I enjoyed learning about unconformities.
I look forward to more!
Thank you! I got the first nonconformity answer wrong…but after that, it was 👍🏼 I look forward to the next video. 😊
Thank you Professor
Morning dose of geology, FANTASTIC! Thank you
Hey Shawn good to see you again.
Thank you, great presentation
I used to live by the Ogden, Utah one you showed. Very cool!
I recognized the famous location in Scotland. I knew about unconformities but not the various types.
These videos are extremely helpful. I see myself and the rest of the team very lucky students to have access to these quality lessons.
Can't thankyou enough 🌍🌏🌎🌒🦉
I found out that James Hutton actually figured all this out and found his prime example at Siccar Point way back in the 1700's not 1800's! He didn't even live to see the 1800's. It took almost another century before Lyell promoted his ideas in the 1800's and made them more widely known and even then they were very controversial. Hutton had realized way back in the 1700's from reading the rocks that the amount of time reflected in their layering and deposition (and even that they WERE deposited by natural processes) meant that the Earth was unfathomably older than had been assumed from the Biblical account of creation. People's minds were blown, at least his compatriots who saw and understood the evidence he found!
Thanks for the series, the fun quizzes and great illustrations. I have been trying to learn about geology and the mindblowing past ages of the Earth the last few years, and need a lot of review. Info flows in through one neuron and then out (or into a black hole) through another...
Great lesson shawn
Perfectly timed video, Shaun. I’ve just spent the day exploring in the North West Highlands Geopark which included stopping by at Knockan Crag to view the Moine Thrust which is itself I guess an unconformity of sorts?
The Moine Thrust is a fault contact (not an unconformity)
It is a little confusing first up remembering what prefixes apply where....Un, Non and Dis.
Thank you Sir, your videos always clear my doubts and make me better in Geology day by day
thank you
What would happen if the metamorphic rock still has preserved the stratification and you can see the unconformity cuts it at an angle? Would it still be a nonconformity?
Thank you! Why are fault breaks so clean? That first illustration showed clean fault breaks 10’s of feet long, and not even vertical or parallel to each other. Why did that section of earth fault away to below the other? Does that fault only occur in sedimentary layers?
Before I begin to sound like a nit-picker and a complainer, let me say that this is some of the best content on the internet. Shawn’s focus on and mastery of the subject matter and his ability to get the point across to students is without equal. I am finally able to learn GEO in a better way than I should have done when I first took an elective course in it in college. Sadly, I took the course concurrently to taking some of my most challenging advanced level accounting courses, and when push came to shove, I had to give priority to my accounting courses. Now I am able to learn what I missed. Thank you Shawn!
That said, am I the only one hearing a ringing in the audio? It’s very distracting once you hear it. I’m willing to bet donuts it’s due to the cheap headset microphone. Shawn, I urge you to find a better solution. It would be such a shame to forever ruin what is otherwise a treasure of work by using sun-standard recording equipment. The archive Gods are sad. 😢
I couldn't hear it at all in any playback. Nonetheless, I have upgraded to a better (I hope) mic.
@@shawnwillsey It's quite possible but I think unlikely that my sound system is compromised, or that I've developed super-hearing from years of sitting in front of high end audio equipment. The other valid option is that you are correct, sir. In any case, I applaud you for being one of the few content creators who actually READS his comments and TAKES IMMEDIATE action to address them. That's a rare quality. I've watched a couple of your videos since this one with the audio anomaly and as far as I'm concerned, the audio sounds great now. Thanks again, professor.
Liking the new haircut!😊 Very Gneiss!
8:40 Layer number 5 is suspiciously missing
It was deposited after 4, and eroded away at the same time as 4 and 3 were. It’s an “invisible” layer in this drawing.
@@mtcynthus I think it should read 1, 2, 5, & 6 In the "Subsidence & Deposition of rocks" column. If it's not in the first column "Deposition of rocks" it should not be in the third column "Subsidence & Deposition of rocks". What am I missing? Help Shawn. Great video.
Thx boss! 👍
Nice
So what would you call the contact between an impact crater and the overlying fill/ subsidence layers i.e. the Chesapeake bay impact crater
Could folding be considered an angular unconformity?
The bit of OCD in me just *needs* to know what happened to layer "5" at 8:10, layers "D" & "E" at 9:20, and layers "L", "M", "N", and "O" at 11:30 !
I think that the thing that I have the hardest time with in this subject area are the labels that geologists use for the various use for things and trying to remember which is, for example, a disconformity and which is a nonconformity. I can remember the three type, but just not the labels that go with each (apart from the obvious "angular unconformity"!) Any hints on remembering which is which? Am I just missing some logic which explains which is "Dis-" and which is "Non-"?
Conforming means that the layers are consistent with one another.
A dis-conformity happens when the layers look like they are conforming (the tilt of the layers is consistent) but in reality they weren't deposited one after the other, there's a time gap in between.
Non-conformity is when the rocks below don't conform at all. The contact is very irregular
Hello everyone
Uh oh. I need to study for our mid-terms.
Ultimat
When James Hutton discovered Siccer Point's unconformity, the conventional wisdom was that Earth was 5000 years old. He used his observation to assert the world was much older, but it couldn't be proven for another 100 years when carbon dating was available.
How did he know what he saw at Siccer Point would take more than 5000 years? It seems like there is an unconformity in his thinking. What was his logic?
"conventional wisdom was that Earth was 5000 years old"
Shawn, let's consider some places on earth. (1) the Swiss alps (2) the Mediterranean sea (3) the Sahara desert (by the way, these three places are less than 1,000 miles apart) also (4) the Mariana trench (5) Papua (these places are less than 1,000 miles apart) and lastly (6) Iceland. Let's say these places all got buried at the same time; earth gets destroyed.
Now, i don't believe in space aliens, but let's say they exist and visited earth after it was destroyed, and, let's say some of the aliens were geologists 🙂 and they did not have a history book of earth. Do they dig into the Icelandic layer, notice that it is igneous rock, and conclude that it is the oldest rock because planets are igneous before sediments form? Do they dig into the Mariana trench layer and conclude (based on weird looking fossils of sea creatures and the fact that it is the lowest layer) that it is the oldest? Do they dig into the Mediterranean layer, noticing that a bit north and stratigraphically higher are deer fossils, and, a bit south are camel fossils...well, which do they conclude is oldest?
Shawn, may i suggest to you that geo-layers, in the earth, may be, not so much geo-ages but geo-environments? Our core beliefs guide our interpretation of the evidence. If our core beliefs are wrong we may be way off in our conclusions.
Thankfully, we have the history book of the earth...The Holy Bible. Granted, It Does not Speak on every detail.
Thanks for listening.
When geologists say the rock at the bottom is older, they are talking about the stratigraphic column, not necessarily the topography. Sometimes the oldest rocks get pushed up and become high topographical points. But they remain at the bottom of the stratigraphic column
Radiometric dating can be done by anyone, even non-humans.
@@TheDanEdwards Will aliens, like many humans, choose to use only the radiometric dates that match up with their core beliefs?
@@TheDanEdwards I should have, also, mentioned the radiocarbon dating of dino-tissue, coal, diamonds etc. Forgive me.
Thanks!
Many thanks for your kind support of geology education.
Thank you