Classification of Sedimentary Rocks Part 3: Chemogenic Rocks
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- čas přidán 14. 05. 2023
- With siliciclastic and biogenic rocks covered, that leaves only chemogenic rocks to finish up with sedimentary rocks in general. These are rocks that precipitate from natural waters, usually due to evaporation. How does this occur, and what are the minerals that typically make up chemogenic rocks? Let's find out!
Script by Jared Matteucci
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hey, I am all the way from the UK and I just wanted to tell you that I found your geology videos really helpful for my geography exam, thank you!
I love rocks, thanks for your hard work Dave.
Neat information! The next time I go to Trona, CA I will be inspired by the idea of crystal formation and how it forms. I believe there's pink Halite there which was neat to see a few years back when I went on a lapidary field trip with my kiddo. What's interesting is the idea to preserve our crystal findings by using a type of Brine wash instead of regular water. It was cool to experience that years ago. I bet my kiddo would like to watch this and do another field trip out there to Trona and it will be a lil more appreciated re the field trip and the info from here! Cool! 👍✌️💖
I was listening to a podcast recently ("Ologies," with Alie Ward) and Alie spent some time with a geologist recently. One of Alie's listeners asked an interesting question, which I was wondering if you were willing to tackle. Quite simply, the question was whether ice is technically considered a "rock," or not?
Professor Dave, I’m returning to college after having to take a medical break after being diagnosed with a chronic health condition. I know this video isn’t chemistry related, but it is your latest, and my chemistry exam is tomorrow.
Your videos caught me up on almost an entire semester that I had missed while being in the hospital. I was given the option to waive the final for a partial credit, but with your help, I feel confident in my ability to pass.
Thank you so much for all you do :) 🤍
Yes Professor Dave, yes !
Love this series thanks. I never would have even considered any of this without your channel. Cheers from Toronto
Would love to get engineering lectures from you:)
We love Dave!!!
Can you do an episode giving me some info on the "Incompleteness theorem" & "Modal logic" & "Proof theory"...
PLEASE and thank you...
Yaey! Dave delves into geology too. 😀
Professor Dave, I would just like to say that you are the Ryan Owens* of Flat Earth Debunking. You removed all doubt from my mind. And I love how you make your presentations.
*Ryan Owens was a great debunker for the 9/11 Inside job conspiracy.
Flat earth theory is absolute bull**** but 9/11 inside job theory is only false insofar as the US government limited itself to not retaliate against the operation led by two of its alleged allies in the Middle East, namely a country that starts with an I and ends with an L and another which is a double word that starts with an S and ends with an A.
And WT7, come on...
Thanks Dave
Please make more about pharmacology .
Ok my guy Dave got him a haircut looking good dave
Hi
سيدي البروفيسور
اريد مواضيع عن الغاز الصخري الذي في قاع البحر
هذا تكلم عنه اسحاق عظيموف لفترة بسيطة
الان ايطاليا وبريطانيا يستفيدوا من معلوماته
في المتوسط والبحر الاحمر الذي تغير اسمه لأسود الان.
في الاطلسي موجود في سواحل امريكا
Evaporite?
I have a question about all this "sedimentary rock" thing. And maybe this is explained in the video coz I havn't even watched it yet so I could be making an utter fool of myself asking this, but, there's all this talk of sediment covering this that and the other thing and we can see all these sedimentary layers, and we have the geoligical columna and all that. What I don't quite get is where all the actual *volume* of sediment came from? Something had to erode somewhere to be sedimented in some other location. Yet we seem to have this relatively uniform sedimentation all over the freaking globe. And I always wondered "where does the mass come from".
Of course if you ask a CREATIONIST this you know the answer you get, LOL, but I wonder about the real answer. :)
In video
I'm not sure why you have the impression of uniform sedimentation. Consider for a moment that the Appalachians were probably longer and higher than the Himalayas but today they're barely big hills. Places like that are where the sediment comes from. Most sediment eroded from continental settings, take the Mississippi drainage for example, end up in very large delta complexes. The Miss. drains everything from the Rockies to the Appalachians and that results in a delta that covers thousands of square miles and a sediment column over 40000 feet thick. Now add in all the major deltas of the world, Amazon, Nile, Yangtze, Rhine, Indus, Yukon, Mekong many others, that's A LOT of sediment. I think you may be viewing the landscape around you and you don't see a lot of sedimentation. Above sea level the residence time of any given particle is very short. Eventually it will make it's way to the sea. The vast thicknesses of limestone in many basins wasn't eroded from somewhere else and deposited there, as Dave's video explains, most carbonate rock forms in place either from biological activity or chemical precipitation so unless you're a scuba diver you never see it forming.
@@tonydagostino6158 When I was a baby boy and was taught about the "geological column", one interesting fact that it was, well, not "uniform" across the world but "similar". Maybe that is 70's knowledge tho and totally wrong :P
@@ZapAndersson I'm sorry I didn't answer your question. Basically it comes down to the principle of uniformitarianism which I think Dave must have defined in one of his videos
the sediments basically came from everything, everything erode, especially mountains. it just takes a lot of time and depending on the conditions (weather, river transport, wind, etc) which help erode and move sediments.
I love rocks.
damnit i had an exam on this last week
Debunk "Dr" Ahmad Malik
Dave how come the higher floors of big buildings arent wider than the bottom floors if we live on a globe though????? 😂😂
Because architectural engineers know how to calculate and compensate for the divergence of the plumb line (which points to the gravitational center of the globe), but the small base of a building compared to the immense size of the earth makes the difference in width negligible - barely a few millimeters. But bridges with a very long span actually do require the structural engineers to calculate the differences in plumb line angles relative to each other, because the curvature of the earth can make opposite ends of a bridge "tilt" away from each other by more than a few inches, which is enough to keep parts from matching together without that compensation.
In addition, the military now uses computerized targeting systems that take into account both the curvature of the earth and the coriolis effect from its rotation. Without those calculations a long range projectile from the big guns of a battleship could almost literally miss its target by a mile. And the shape of the earth has been proven by innumerable methods which all corroborate each other. If you want to know some facts, ask Dave what different methods have been used to determine and confirm the shape of the earth. Being a musician, I find the reverberation of sound waves (seismic waves from earthquakes or at one time, nuclear testing) to be intuitively, logically, and mathematically convincing. My grandfather was a surveyor for the railroad, and compensation for the curvature of the earth was crucial for laying "level" track. I have no reason to suspect that he was a globe conspirator.
I also no longer have any religious belief that humanity is innately evil, and so I tend to think of people as predominantly trustworthy, unless there is evidence otherwise. Research done to determine the economic viability of grocery store self checkouts proved that the vast majority of people are honest, and if the money grubbers have come to that conclusion then I have no reason to doubt it. That makes a worldwide conspiracy to conceal the true shape of the earth preposterously unlikely, statistically verging on being impossible.
But none of this has a goddam thing to do with the formation of mineral deposits. So what was your purpose in asking that irrelevant question, knowing full well that Dave has answered it elsewhere repeatedly?* Asking such a question is pointless... even asinine... when you have no intention of understanding or accepting the answer.
P.S.
Would you _please_ explain how my phone's GPS can work on a flat earth with no satellites in space????? 😁😁
What causes gamma ray bursts in the "fake space" flat earth "theory"????? 😁😁
Can you describe the forces that cause the sun's season trajectory migration proposed by the flat earth model????? 😁😁
How many guards would it take to effectively patrol an icewall circling the entire perimeter of the earth, and how are they supplied with food, heating fuel, and other basic necessities????? 😁😁
How does the flat earth proposal explain the ocean currents that flow _around_ Antarctica if it is an enclosed circle and not an isolated continent???? 😁😁
Might I suggest that you resolve the impossible inconsistencies and inexplicable phenomena in the flat earth supposition before you try to discredit the scientifically conclusive, highly predictive, technologically useful globe model?
* Just a few thoughts... but I seriously hope you were joking.
@@derreckwalls7508 it was a joke. Hence, the laughing emojis. I appreciate the time you put in for that answer though
@@donmayleone4845 to his defense, you never know what a flattie is thinking. The flattie may have thought that emoji stood for anything!
@@JayWillis2120 this is very true. They create their own meanings for things so that comment could've easily came from the muddled up mind of a flattie 🤣
@@donmayleone4845 😂👍
I thought it was a joke at first, and laughed. But you know what fooled me... that plethora of question Mark's at the end, and the emphatic double "guilty grim" emojis. That is so typical of undereducated and overconfident flat earthers. You nailed it!
It was no effort, really. I've actually heard that sort of question more than once from flerfs, so only the first part addressing the floor widths was written on the spot, and the remainder was just a cut-and-paste from my inventory of previous responses. It pisses me off that because flerfs detest Dave so much they occasionally feel compelled to post their bovine excrements on his tutorial videos. I had to respond... just in case.
Thanks for the giggles!
Dave you are being pretty aggressive on Twitter these days.
Yeah I’m trying it out.
@@ProfessorDaveExplains No, Professor Dave! Don't do it! Don't fall into the Twitter black hole. You think the whack jobs are prevalent here on CZcams?! Twitter makes CZcams look like Girl Scout summer camp when it comes to mindless trolls, bots, and science deniers.
Dave reads Wikipedia for a living ;)
No, I’m a science communicator.
Tell me you're religious without saying you're religious.
There is a few misinformations in there. But not a bad video
where are the misinformation?
@@columnarbasalt4677 2:30, 3:41
@@bed1g149 ok? and why is this misinformation? you got better idea?
@@columnarbasalt4677 it's old information. Newer studies disproved it.
Let’s see some links, bc I have a feeling you don’t know what you’re talking about