After (binge) watching the series so far, I must conclude that this is the best and most in depth introduction to geology I have come across. The structure is brilliant actually, giving a great insight into the processes from the very start which makes it so much easier to understand and reproduce for practical purposes. Really enjoyable.
Been binge watching from 1 to here on 150% speed because I am impatient. Very interesting stuff, very happy you have put this out here for anyone to watch and learn. Thank you!
Absolutely love this video! Extremely educational, and would even be easy for middle and high school students to understand. exceptional video!! I can't wait to watch your other videos! Definitely worth a 100 thumbs up!!
PART 1: I got into becoming a major rock hound by first finding a good15 pounds of green aventurine while walking my dog in the cemetery. Then, walking my dog again in a dirt recycling center, I came upon a rock pile that had beautiful specimens in it, including a little citrine, amethyst and teeth quartz. That got me into studying rocks and minerals, but I realized that I was not knowledgeable enough to identify rocks and minerals. So, I studied all of geology for 7 years.
I studied Geology and received an undergraduate degree at a Canadian University back in the 1980s. Sure wish the lectures at the time were as clearly and succinctly delivered as the ones on these videos.
Thank you for your kind comment! At some point, I will expand this series and cover some sophomore-level courses as well, such as mineralogy, maps, geomorphology, and possibly volcanology. Hopefully you will be willing to review that content as well.
Mind blown! I'm definitely going to watch part 3 and 4 again to let it sink in further. This is the first time I'm motivated to look more into chemistry/psychics as I had no interest in it at school and did very badly in those areas.
When the Doc is discussing Mineral collecting kits - who has made their own using a Whitman's Sampler box? I must have made a dozen of these when I was a kid I had so much fun collecting rocks and minerals. Unfortunately, no internet back then - but trips to the public library to learn about the sciences. 50+ years later - I still have a couple of those kits
nice way of teaching,actually i'm doing my Msc but after working for 2 years in other field,it's like a good refresh of what i have learned before,...and i feel like i didn't learn anything compared to these newly graduates that are doing so well,i hope i could do as good as them after watching all the videos,thank you!!
Thank you so much for producing this a+ quality and very educational set of educational videos, I have slowly been teaching myself geology over the years and this series has been an enormous benefit to me as I continue my studies. Is it possible for the public to buy the textbook you refer to? Thank you so much and keep up the good work
PART 2: I have prospected beautiful minerals at Sterling Hill Mine, the dirt recycling center and collecting dimensional stones, such as mall rock mulch which has beautiful granites with calcium or quartz veins in them, muscovite mica books and schists, granites with large schist, orthoclase, shale, slate, marble, chert, and even vesicular basalt from a road cut. I love your course. Frank Reiser M.S.
I need to understand everything ,especially when English is not my mother language . Beautiful intelligence . We are made from beauty intelligence. You are beauty mind.
Hello these are wonderful lectures. I really love the geologic process and these lectures have made it very understandable to my poor older brain. Is it possable to get the homework for further work? I have never asked for homework in my very long life lol!
For the composition of the earth you were talking about the crust and not the whole earth, but you didn't precise it And if I'm not mistaken put's the Iron at ~30%, the Oxygen at ~30% and the Silicon at ~15%
Yes, I was referring to the composition of the average crustal rocks (thanks for pointing that out that ambiguity, I'll be more precise in future versions of this video). The bulk ("whole") composition of Earth is a bit harder to figure out because we need to make some assumptions from meteorites, seismic waves, and geochemical models. Here's a good paper on our current thinking on bulk Earth composition. quake.mit.edu/hilstgroup/CoreMantle/EarthCompo.pdf
38:42 it's means 33.33% for each I assume. If i get how to use that chart correctly, each axis uses the previous one anticlockwise to get the percentage.
I am a new subscriber, but want to thank you for these fantastic lessons in geology. I have learned so much already! I can't wait to try out my new knowledge. :D
Hi, Do Geologists sometimes need the services of a Geochemist to properly identify the Rock or Mineral Sample that has been found? FOR INSTANCE:: Let's say that there are two Minerals with each looking very similar in their physical appearance and each having the same 3 Chemical Elements that make up each Mineral but in different proportions by Percentages (%}. One Mineral Sample may have the Percentage Ratios of 60-20-20 and the other may have the Percentages of 40-30-30, again with the same Chemical Elements in different proportions. I would "assume," if I may,, with that much variation in the Percentages of the Elements, there would "most likely" be enough Physical Appearance variations to properly identify the two Mineral Samples by sight by the Geologist. If they could NOT be readily identified by the Geologist, would that require the Samples to be Examined & Analyzed by by a Geochemist? ~TIA, Bruce~
Good question. Geologists, for the very reasons you just cited, receive extensive geochemistry training during their undergraduate years so that, in a sense, they can be their own geochemist when needed. A common example of what you are bringing up is plagioclase, being a solid-solution, can have very different chemistries depending on the condition which formed the mineral. Geologists learn how to easily measure the chemical composition of plagioclase during their sophomore or junior years using an optical microscope. Same for most of the other common rock-forming minerals.
Good to know u can eat anything up to 4 Mohs. Btw with pumice, vermiculite and perlite seems that its just not measured right cause it traps so much air that gets counted as its volume. And also contributes to the floating.
Thanks a lot for the great videos. Slight mistake at 19min 40 sec. The earth is not a giant ball made of what you list, because yyou are listing the crust components, the mantel and the nucleus are different..
Just discovered your series. Love the lessons. On this Geology (4) lesson you list the breakdown of earth composition and Iron is listed as 5% However, every time I see a 3D cutout view of the Earth the solid Iron core is shown as this huge ball and then it is wrapped with a liquid Iron core (even bigger) altogether hardly 5% and more like 20% If were to draw those layers in the correct proportion, what would the view look like?
I am guessing the relative abundance of elements in the earth is with respect to mass rather than relative number of moles. Mass vs. moles would give different ratios of elements. The relative abundance of hydrogen, sodium and carbon, in number of atoms, is going to be much higher than their contribution to total mass because they are light elements.
Old saying Iron sharpens Iron, presenting all this material to us, gives a chance that we get a little sharper too ! thank-you more good understandably talks of geology luv it luv some rare earth!
I'd be quite interested in doing some chemistry and modify minerals to get some interesting properties and colors, I wonder whether people do this, or are simple books to get started Just a minor detail but in 49:55 (OH)2 is not water, but hydroxide, i.e what makes compounds basic.
What a fascinating subject! Thanks for posting this wonderful class on Geology. Gold, I was told it cannot be formed here on earth. I was told it can only come from a star going supernova and a meteor carrying it from that supernova coming here to earth. But in your video, it looks like it grows on quartz? I will believe a geologist over an astronomer. Hope you can answer.
Wait-What? Covalent bonds are stronger than ionic bonds?? My last chemistry class was around 1975-I’m sure new discoveries have been made and there is more to bonding than simple covalent vs ionic . . . But since when are covalent bonds stronger than ionic bonds? That would turn most properties of water upside down . . . ????? Is this just re: silicates? Please clarify.
Hello, I really enjoy your channel. I am interested in geology and wonder do you have the PowerPoint presentation available or could you recommend reading material if I was to undertake an undergraduate degree.
@@EarthandSpaceSciencesX Rock identification and how to determine which type. Furthermore, if you had a recommendation of geology books I would greatly appreciate it. Kind regards from Ireland.
@@owenboyd5674 the main book used to teach geologists Rocks and Minerals for decades can be found here: a.co/d/0wEzDyx For a great introductory textbook, I would recommend the following: a.co/d/gJSW9aG Hope this helps!
Am I mistaken or when he goes over the colors of minerals and points out that there are orange minerals, isn’t that an orange citrine Quartz Crystal piece on the upper right that he labels as a stained piece of a type of rose quartz?
This was a bit of a leap for me from the previous lectures. Struggling a bit with this. Gone back to you tube for lots of clips and talks on chemistry etc. Would like another lecture for total chemistry beginner. Having said that will carry on with other lectures.
To do that topic justice would require a series of lectures. While I would enjoy doing it (it's really interesting stuff!), I'm not sure I could get to it anytime soon. Right now we are producing an Environmental Science series, and then possibly will do a series on Forensic Geology and then another series on Historical Geology. Sophomore/junior-level lectures are in the plans, but not for a while.
@@EarthandSpaceSciencesX ok thats great.. However depositional environments are really very important and please give it a try whenever possible.. Many thanks
I am a middle aged man and never saw euhedral calcite as rock mulch on someone's property. My neighbor had it. She gave me permission, so I collected a lot of it.
The best I can do is put down a quick link where that is answered (this topic goes beyond the scope of my lecture series but is included in a good, semester-long mineralogy class). Try this... www.tulane.edu/~sanelson/eens211/axial_ratios_paramaters_miller_indices.htm
OK I know this is way off subject, but I just found your channel and I have a question, if you would indulge me a little it would be appreciated. Zircon magnetics, have you heard of this and the Baja/ BC theory, if so what are you thoughts on it, has it been proven or still a theory? And I do enjoy the videos I've seen so far, the format, and content, thank you
Professor Paul Day, Professor of Geology and Environmental Science at Dallas College. I don't normally put my name on my videos since, to me, it's all about the learning and the science and I am just deliverer of that information. However, in future videos I may do that since I get the request quite often. I hope you enjoyed the lecture.
Thank you Dr. Paul Day yout Geology course. I took this course from youtube July 2020. I enjoy yout lectures. Best Regards, Hannu Poropudas, Kolamäentie 9E, Kiiminki/Oulu, Finland.
Muscovite is not named after city of Moscow, nor after citizens of Moscow, but after Muscovy, which was an alternative name of (entire) Russia in the middle ages.
When you ask the audience to watch a different video before watching the video they are in. It's usually helpful if you post a link for the previous video in the description of the current video. Maybe you could do that to help out future learners
I'm taking geology online right now and theres no lecutres, just readings and i really appreciate how detailed this is
This guy speaks on my level. I’m only a chemical engineer, but I love watching these geological presentations from my man cave. Thank you.
😂I'm a bookkeeper & I love listening to these lectures
After (binge) watching the series so far, I must conclude that this is the best and most in depth introduction to geology I have come across. The structure is brilliant actually, giving a great insight into the processes from the very start which makes it so much easier to understand and reproduce for practical purposes.
Really enjoyable.
Thank you for posting this series. It's still expanding minds years on from its creation and from continents away! Thanks for the teaching!
Glad you enjoy it!
Thank you! I am thrilled to find these lectures. Geology class at home, Finally!
Glad you like them!
Been binge watching from 1 to here on 150% speed because I am impatient. Very interesting stuff, very happy you have put this out here for anyone to watch and learn. Thank you!
Thrilled to have you studying with me! I have more lectures coming and several "updated" (time to replace some old ones) lectures as well. Cheers!
Absolutely love this video! Extremely educational, and would even be easy for middle and high school students to understand. exceptional video!! I can't wait to watch your other videos! Definitely worth a 100 thumbs up!!
I really appreciate the compliment!
PART 1: I got into becoming a major rock hound by first finding a good15 pounds of green aventurine while walking my dog in the cemetery. Then, walking my dog again in a dirt recycling center, I came upon a rock pile that had beautiful specimens in it, including a little citrine, amethyst and teeth quartz. That got me into studying rocks and minerals, but I realized that I was not knowledgeable enough to identify rocks and minerals. So, I studied all of geology for 7 years.
I studied Geology and received an undergraduate degree at a Canadian University back in the 1980s. Sure wish the lectures at the time were as clearly and succinctly delivered as the ones on these videos.
Thank you for your kind comment! At some point, I will expand this series and cover some sophomore-level courses as well, such as mineralogy, maps, geomorphology, and possibly volcanology. Hopefully you will be willing to review that content as well.
Perfect explanation and visuals, highly rate
Fascinating lectures! Thank you all for your amazing knowledge and willingness to teach us!
Mind blown! I'm definitely going to watch part 3 and 4 again to let it sink in further. This is the first time I'm motivated to look more into chemistry/psychics as I had no interest in it at school and did very badly in those areas.
Great presentation. Flows well. Wish my instructors were this good. Rocks Rule !
Thanks for your appreciation!
A lot to digest, but good basic discussion. Will have to view the video again and supplement it with the textbook. You are a great teacher. Thank you.
Had to come back and revisit because I struggled. I'm so appreciative that you have made these videos available!
I am very happy to have found your channel. You have an amazing ability to teach and explain your subjects.
Thank you so much!
oh man! I see something like 20 lectures after this. Thank you for offering this!
When the Doc is discussing Mineral collecting kits - who has made their own using a Whitman's Sampler box? I must have made a dozen of these when I was a kid I had so much fun collecting rocks and minerals. Unfortunately, no internet back then - but trips to the public library to learn about the sciences. 50+ years later - I still have a couple of those kits
Excellent Video !!! I’ve been looking for video that CLEARLY explains what this video explains. Thank you! -college mineralogy, California
nice way of teaching,actually i'm doing my Msc but after working for 2 years in other field,it's like a good refresh of what i have learned before,...and i feel like i didn't learn anything compared to these newly graduates that are doing so well,i hope i could do as good as them after watching all the videos,thank you!!
Your videos are awesome sir ....really interesting.....thanks a lot.....
Thank you so much for producing this a+ quality and very educational set of educational videos, I have slowly been teaching myself geology over the years and this series has been an enormous benefit to me as I continue my studies. Is it possible for the public to buy the textbook you refer to? Thank you so much and keep up the good work
PART 2: I have prospected beautiful minerals at Sterling Hill Mine, the dirt recycling center and collecting dimensional stones, such as mall rock mulch which has beautiful granites with calcium or quartz veins in them, muscovite mica books and schists, granites with large schist, orthoclase, shale, slate, marble, chert, and even vesicular basalt from a road cut. I love your course.
Frank Reiser M.S.
I need to understand everything ,especially when English is not my mother language .
Beautiful intelligence .
We are made from beauty intelligence.
You are beauty mind.
excellent and well organized presentation for us having less knowledge of geology
Thank you for your appreciation!
Hello these are wonderful lectures. I really love the geologic process and these lectures have made it very understandable to my poor older brain. Is it possable to get the homework for further work? I have never asked for homework in my very long life lol!
This is an excellent channel, and thank you very much for creating this video!
Thank you!
I have found a precious stone.
The video helped me alot.
Thanks to your educational and informative video.
For the composition of the earth you were talking about the crust and not the whole earth, but you didn't precise it
And if I'm not mistaken put's the Iron at ~30%, the Oxygen at ~30% and the Silicon at ~15%
Yes, I was referring to the composition of the average crustal rocks (thanks for pointing that out that ambiguity, I'll be more precise in future versions of this video). The bulk ("whole") composition of Earth is a bit harder to figure out because we need to make some assumptions from meteorites, seismic waves, and geochemical models. Here's a good paper on our current thinking on bulk Earth composition.
quake.mit.edu/hilstgroup/CoreMantle/EarthCompo.pdf
38:42 it's means 33.33% for each I assume. If i get how to use that chart correctly, each axis uses the previous one anticlockwise to get the percentage.
I am a new subscriber, but want to thank you for these fantastic lessons in geology. I have learned so much already! I can't wait to try out my new knowledge. :D
Awesome, thank you! I plan on making a lot more of these so hopefully you'll stick around to watch those too when they get released.
exactly what I needed to understand thankyou
Hi, Do Geologists sometimes need the services of a Geochemist to properly identify the Rock or Mineral Sample that has been found?
FOR INSTANCE:: Let's say that there are two Minerals with each looking very similar in their physical appearance and each having the same 3 Chemical Elements that make up each Mineral but in different proportions by Percentages (%}.
One Mineral Sample may have the Percentage Ratios of 60-20-20 and the other may have the Percentages of 40-30-30, again with the same Chemical Elements in different proportions.
I would "assume," if I may,, with that much variation in the Percentages of the Elements, there would "most likely" be enough Physical Appearance variations to properly identify the two Mineral Samples by sight by the Geologist.
If they could NOT be readily identified by the Geologist, would that require the Samples to be Examined & Analyzed by by a Geochemist? ~TIA, Bruce~
Good question. Geologists, for the very reasons you just cited, receive extensive geochemistry training during their undergraduate years so that, in a sense, they can be their own geochemist when needed. A common example of what you are bringing up is plagioclase, being a solid-solution, can have very different chemistries depending on the condition which formed the mineral. Geologists learn how to easily measure the chemical composition of plagioclase during their sophomore or junior years using an optical microscope. Same for most of the other common rock-forming minerals.
@@EarthandSpaceSciencesX --- THANK YOU Greatly Sir.
This is very helpful especially since my teachers doesnt know how to teach and we have class at home
I'm glad it was useful to you!
You are a gifted teacher
Thank you so much!
Mother nature know precisely how to mix and make 😱 👍
Indeed it does!
Thank you so much sir! You explained it very well. It helped me in my geol 100 lessons (including your other videos).
Glad I could help!
Professor is a GOAT
Good to know u can eat anything up to 4 Mohs.
Btw with pumice, vermiculite and perlite seems that its just not measured right cause it traps so much air that gets counted as its volume. And also contributes to the floating.
Perlite has some very interesting properties, that’s for sure.
Dude, this is soo good. Biology PhD here wanting to brush up on geology. You really explain this very well!
Thanks a lot for the great videos. Slight mistake at 19min 40 sec. The earth is not a giant ball made of what you list, because yyou are listing the crust components, the mantel and the nucleus are different..
Just discovered your series. Love the lessons.
On this Geology (4) lesson you list the breakdown of earth composition and Iron is listed as 5%
However, every time I see a 3D cutout view of the Earth the solid Iron core is shown as this huge ball and then it is wrapped with a liquid Iron core (even bigger) altogether hardly 5% and more like 20%
If were to draw those layers in the correct proportion, what would the view look like?
I am guessing the relative abundance of elements in the earth is with respect to mass rather than relative number of moles. Mass vs. moles would give different ratios of elements. The relative abundance of hydrogen, sodium and carbon, in number of atoms, is going to be much higher than their contribution to total mass because they are light elements.
Yes, it is weight percentage.
Old saying Iron sharpens Iron, presenting all this material to us, gives a chance that we get a little sharper too ! thank-you more good understandably talks of geology luv it luv some rare earth!
So many names. Is there a good family tree type of diagram to show the classifications of minerals?
4:58 the orange/brown - that's citrine...awesome presentation....still don't know what book is part of the lectures...
Lol dude your videos are a godsend in this remote learning time! Thanks SO much!
Glad to help!
I'd be quite interested in doing some chemistry and modify minerals to get some interesting properties and colors, I wonder whether people do this, or are simple books to get started
Just a minor detail but in 49:55 (OH)2 is not water, but hydroxide, i.e what makes compounds basic.
Awesome, want to watch them all! Great job thx
Would you mind sharing presentations? It would be excellent for the audience. Kind regards...
What a fascinating subject! Thanks for posting this wonderful class on Geology. Gold, I was told it cannot be formed here on earth. I was told it can only come from a star going supernova and a meteor carrying it from that supernova coming here to earth. But in your video, it looks like it grows on quartz? I will believe a geologist over an astronomer. Hope you can answer.
I loved this video learned a lot from it, thank you !!!
Glad it was helpful!
Wait-What? Covalent bonds are stronger than ionic bonds?? My last chemistry class was around 1975-I’m sure new discoveries have been made and there is more to bonding than simple covalent vs ionic . . . But since when are covalent bonds stronger than ionic bonds? That would turn most properties of water upside down . . . ????? Is this just re: silicates? Please clarify.
This video's a gold mine.
Great Lecture. Can you share the presentations?
I think this is absolutely fantastic
Want to bring to your attention that at 14:50 you meant to say that quartz is 2.7 times heavier than water.
Great lecture. Thanks for sharing.
Thank you for your great informative video to uploaded, it's very helpful.
You should give a short explanation as per the Fe3O4 part that got edited out. Ive studied this in terms of Meteorites. Neat stuff.
you described quartz as having multiple colors, but isn't the orange/red color quartz a citrine?
Yes, we could call it a citrine variety of quartz.
This stuff can Heal you.
What dictates the formation patterns on metaloids?
What are streak plate’s made of? Would water purification (for human consumption) be aided by silicate minerals? If so, light or dark silicates?
The unglazed back side of a white porcelain tile is used as a streak plate.
Hello,
I really enjoy your channel. I am interested in geology and wonder do you have the PowerPoint presentation available or could you recommend reading material if I was to undertake an undergraduate degree.
Which topic specifically are you interested in reading about most?
@@EarthandSpaceSciencesX Rock identification and how to determine which type. Furthermore, if you had a recommendation of geology books I would greatly appreciate it.
Kind regards from Ireland.
@@owenboyd5674 the main book used to teach geologists Rocks and Minerals for decades can be found here: a.co/d/0wEzDyx
For a great introductory textbook, I would recommend the following: a.co/d/gJSW9aG
Hope this helps!
Legit top-tier content. At 2x the vid is clear, concise, w great visuals. Nice quote btw:)
Am I mistaken or when he goes over the colors of minerals and points out that there are orange minerals, isn’t that an orange citrine Quartz Crystal piece on the upper right that he labels as a stained piece of a type of rose quartz?
☕Sip. Thanks for the digestible presentation.
My pleasure!
This was a bit of a leap for me from the previous lectures. Struggling a bit with this. Gone back to you tube for lots of clips and talks on chemistry etc. Would like another lecture for total chemistry beginner. Having said that will carry on with other lectures.
me when rock
Awesome lesson and teaching!
Glad you liked it!
(OH)2, ie 2 oxygens and 2 hydrogens, is not water. It's dihydroxide (as in the hydroxide group of sodium hydroxide (NaOH)). Thanks for the video.
Excellent video... can u please make a video on Depositional Environment in view of hydrocarbon formation and deposition.
To do that topic justice would require a series of lectures. While I would enjoy doing it (it's really interesting stuff!), I'm not sure I could get to it anytime soon. Right now we are producing an Environmental Science series, and then possibly will do a series on Forensic Geology and then another series on Historical Geology. Sophomore/junior-level lectures are in the plans, but not for a while.
@@EarthandSpaceSciencesX ok thats great.. However depositional environments are really very important and please give it a try whenever possible.. Many thanks
Thank you very much
Excellent presentation!
Thank you! Cheers!
this is a pretty good channel...
Thankya. I feel smarter already, always wanted to know.
amazing!! thank you so much
Very useful
I am a middle aged man and never saw euhedral calcite as rock mulch on someone's property. My neighbor had it. She gave me permission, so I collected a lot of it.
Please elaborate on Miller and Weiss parametric and how to get the faces and structure of crystals. Thanks
The best I can do is put down a quick link where that is answered (this topic goes beyond the scope of my lecture series but is included in a good, semester-long mineralogy class). Try this...
www.tulane.edu/~sanelson/eens211/axial_ratios_paramaters_miller_indices.htm
Cheers Big bro
Really cool cool stuff, fascinating!
Most Geologists are really down to earth.
We try. Lol
in georgia there is a mica member that looks like gold.
Thank you
Do we know if Enstite is forming in outter space (asteroids and such) or does it require a full planet with an active geology like Earth?
I honestly don't have the answer for that. It's a very good question though.
Lesson #4 done and done! This lesson was also particularly tough for me to get through because of the chemistry bit.
I don't even know what you gonna be doin
@@helbitkelbit1790 I'm sorry, but I didn't understand your comment.
@@AGDinCA Geology is a field full of chemistry, if you want to be a Geologist, you might also want to take chemistry lessons!!
Phew, that one got a bit dense. The slide show content really helped digest it though.
Indeed! I'll probably re-record the video in the future and break it up into several smaller lectures....
OK I know this is way off subject, but I just found your channel and I have a question, if you would indulge me a little it would be appreciated.
Zircon magnetics, have you heard of this and the Baja/ BC theory, if so what are you thoughts on it, has it been proven or still a theory?
And I do enjoy the videos I've seen so far, the format, and content, thank you
I want request you
To give me the ppt for you lessons
Is there any way I could get a copy of these notes?
Sorry, I don't post them publicly. At some point in the future that may happen, but as of now I don't provide them.
GREAT DAY...PICK UP SOME ... OOOOOWWWWEEE LOOKING GOOD IN MY BATHROOM THANKS
Thank you sir
Teacher's name would also be nice to know?
Professor Paul Day, Professor of Geology and Environmental Science at Dallas College. I don't normally put my name on my videos since, to me, it's all about the learning and the science and I am just deliverer of that information. However, in future videos I may do that since I get the request quite often. I hope you enjoyed the lecture.
Thank you Dr. Paul Day yout Geology course. I took this course from youtube July 2020. I enjoy yout lectures. Best Regards, Hannu Poropudas, Kolamäentie 9E, Kiiminki/Oulu, Finland.
What is the text book mentioned in the lectures and comments?
you are my geology hero!
Muscovite is not named after city of Moscow, nor after citizens of Moscow, but after Muscovy, which was an alternative name of (entire) Russia in the middle ages.
You are correct. I'll make corrections to that when I record my new mineral video sometime soon.
18:00
Cool video
Thanks
When you ask the audience to watch a different video before watching the video they are in. It's usually helpful if you post a link for the previous video in the description of the current video. Maybe you could do that to help out future learners
Thanks