Identifying Sedimentary Rocks -- Earth Rocks!
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- Опубліковано 25 чер 2014
- For an introductory college-level physical geology class: a review of how to classify and identify a sedimentary rock. Includes a discussion of the textures and compositions of sedimentary rocks including chemical, bioclastic, and detrital clastic. Covers chert, flint, limestone, breccia, conglomerate, sandstones, mudstone, shale, coquina, calcarenite, chalk, and diatomite.
**ERROR IN VIDEO: The image that shows the Mammoth Hot Springs in Yellowstone should be labeled as travertine (calcite). Typically hot spring precipitates in volcanic regions are made primarily of silica. The Mammoth Hot Springs are uniquely calcareous because there's limestone layers under the terraces that are dissolving to create the ions that later precipitate as calcite (travertine) on the surface.
**This video comes near the middle of the semester, so there may be terms with which the audience is unfamiliar. For a full playlist, refer to the Geology playlists on the Earth Rocks! UA-cam Channel.
Content within this video is based on information available in any standard introductory college geology textbook (or lab manual), such as Essentials of Geology -- Tarbuck and Lutgens -- Pearson Publishing.
If you are studying geology and would like access to interactive lessons built around these videos, you can do so by joining the Earth Rocks! UA-cam Channel.
If you are an earth science enthusiast and would like to support our ongoing video development and engage with us behind the scenes...
Or if you are a student and would like access to interactive lessons built around these videos...
you can do so by JOINING the Earth Rocks! UA-cam Channel:
/ @earthrocks .
Thank you!
Born to have fun, forced to take a geology class. Your information is good, no knocks.
great digital class, full of pictures that allow us who are not "hands on" with all these rocks to have a real feeling. Thank a lot for the effort to teach not only CCSF students but all of us over the web!
6!9?!!??p I
Amazing lecture. My physical geology never went that deep into sed strat. Phenomal really.
This is the gist of a whole sed strat semester.
Geosciences student here studying during the pandemic when we couldn't have lab classes, I really appreciate all of those images a lot!! Using these videos along with our Physical Geology textbooks to study has been so helpful!!
These are wonderful videos and make hiking so much more interesting as I have some idea what I'm looking at!
Just don't walk off a cliff.
You'd think that's hard to do while staring at the ground. Nope. That shiny chalcedony that momentarily distracts you..luckily for me, it was only 20 feet lol.
I feel like I can take the video and apply it in life. Thank you.
Very Interesting.Very Well Explained.
thank you!! you saved me on midterms
Thank you!
Thank you that sharing.
amazing stuff!
Nicely done
Nice.. information thank u
nice intro , well done!
Thank you. You are a true scientist.
Your explanations are amazing. No BS, straight to the point, every word is important. I feel like f I lose concentration for a second, I'm missing important things. Luckily, I can replay the video.
Very nice
Amazing presentation for geo lover
Hi ! You have excellent videos! Thanks for sharing them! I would like to look for fossils in my country. Which books would you recommend me to study to be able to identify Sedimentary Structures and Depositonal Environmentes in rocks so that it is easier for me to know where to look for fossils?
Thanks for this video, I have a rock practical later on this afternoon on igneous, sedimentary and metamorphic rocks
♾
comments go frevr wow
Thanks!
You're very welcome. Thank you! :)
Very useful video for students who studying sedimentary petrology 👍🏻....keep it up🔥❤️
i love your voice
Quite informative! Are there dichotomous keys for identifying rocks or can the be arranged like phylogenetic trees for organisms?
You can make dichotomous keys, but I find they aren't very useful in understanding overall concepts. As for phylogentic trees, too different, as their relationship to each other has too many options. At least I haven't seen any.
Hello , how do ancient sand dunes harden into stone ? pressure exerted by overlying material accumulating over time ? are there any experiments reproducing this effect ? Thank you for these videos
No. How would footprints be preserved long enough for the sand to turn to sandSTONE? Sandstone forms quickly under miles-deep water (10k-17k PSI) at ~ 400°C. No water.. no sandstone.
Sir G.
Ms. Wiese, i heard at the smithsonian they have a collection of singing rocks which because of humidity makes sound , Now that i would like to study...
Agreed -- that DOES sound enjoyable! :)
Geología en español, saludos cordiales.
What precipitates the liquid and how does it become solid rock? I thought liquid dries into evaporite?
Crystals precipitate from liquids. In the case of chemical sedimentary rocks, we're talking first about having water dissolve minerals (like salts). Now instead of being solid rock, the elements that made up that rock are ions dissolved and carried by water. When later the water evaporates and can no longer separate the ions, the ions rebond with each other and crystallize as solid salt (precipitation).
A good video to help you understand that is Water Molecule Shape -- especially at the end where it shows salts dissolving and precipitating:
ua-cam.com/video/Gvf8PsQbcRo/v-deo.html
@@EarthRocks Thank you for your time! Been collecting rocks for a couple years now and have massive blind spots regarding the processes.
Excellent
great explanation
Can anyone tell me where I can download the Sedimentary Rock Identification table that they show here because I’ve been looking for it. I think it’s the best one. But I can’t find it.
You can find it in the Lab Manual that accompanies this class. Open up the PDF and check the table of contents to find the Sedimentary Rock Lab. Link: fog.ccsf.edu/~kwiese/content/Classes/geol_10l_text.html
Thank you!
What are Rocks / Minerals called that contain Bone/s?
Bones are a type of fossil. Any detrital sedimentary rock could contain them, but most like it would be a sandstone or mudstone.
@@EarthRocks -- THANK YOU. I have seen plenty of Fossils that contained the "imprints" of Bone but NEVER the "actual bone" it's self but I am sure they exist.
@@brucewinningham4959 Most of the dinosaur bones you see in museums are casts that curators make from real bones they excavate from rock. Over time and burial many bones will be replaced by fluids (permineralization). But plenty remain unaltered. Along the California coast we find whale bones in the cliff rocks.
So these types of rocks found along seashore?
What university are you guys at? Be grateful, because my geology professor does not go into detail this much.
This video is amazing.
Thank you. We're City College of San Francisco. Good luck with your class.
You must be in an into class. You will go much further than this in a sed strat class
I'm not grateful because im in 7 grade and our teacher is forcing us to learn this and it's so boring
they have value the sedimentary rock. & magma lava rock. i got alot kind of rock .
What are clay grains?
Clay is a term given to the tiniest mud-sized grain. All "mud-sized" grains are either silt-sized (the biggest mud) or clay-sized (the finest mud).
Clay is also a family of minerals.
I'm pretty sure that in this video I use the term "clay" only to refer to clay minerals. Clay minerals are sheet silicates that form during the chemical weathering of feldspars and micas. I recommend watching my weathering video to learn more: studio.ua-cam.com/users/videoub9NCVIMBoY/edit
@@EarthRocksAgain thank you!
There are 3 different subdivisions of sedimentary rocks
Clastic
Carbonate
Chemical.
saya banyak punya batu,yg ada diyutob,mau dibawa kemana tdk tahu,bahkan ber-dus2.tdk tahu cara utk yg berminat.
How is it that Texas is spelled as 'Texhas' at 3:12
I was wondering the same
la traduccion no es muy buena, habra algun archivo en español?
+Diana Rodriguez Lo Siento. No hay una traduccion. Script: fog.ccsf.edu/~kwiese/content/Classes/SedRocksScript.pdf
SEEING 'Body Parts' in Stones \ Rocks, is addicting ~ and problematic. Imagine in rocks in pictures or video background.
Help ID: Green [dark] to Brown Glass-ish, solely or layered,^ Translucent or Dull & smooth, Most Right angle, few curve.
^ Some Take shape of Organism. - i think, after Years of noting marks & shapes, they're Echinoderms - 'Crinoids'.
Plan on Replaying as long as it takes to get this straight. Chert, Flint, Calcite, Quartz - lol . . . *Thanks!*
Is there a difference between clastic sedimentary rock and detrital sedimentary rock?
+Mau Jo
Yep! Clastic includes two kinds: detrital clastic and organic clastic.
To be "clastic" a rock has to be compose of fragments of things: other rocks, minerals, shells, etc.
To be "detrital" a rock has to be clastic and composed of rock fragments (not shells).
Earth Rocks! Thank you for your prompt responses. Are chemical sedimentary rocks the only ones that fizz under the acid test or do clastic also fizz?
+Mau Jo
Rocks fizz if they contain calcium carbonate. Calcium carbonate is what most shells are made of and also a common cement.
So... there are chemical sedimentary rocks made entirely of SiO2, therefore that do NOT fizz under acid.
And there are many clastic sedimenatry rocks (those made of shells or those cemented with calcium carbonate) that DO fizz.
Earth Rocks! Thanks again. If a clastic sedimentary rock does not react to the acid, that makes it detrital? Thank you for your time.
+Mau Jo
No. There are clastic sedimenary rocks made of mud-sized silica shells (called diatomite). No calcium carbonate. Not detrital. To decide if something is detrital you must be able to see the clasts and see that they are rock fragments.
I was lost within the first 5 mins.
Dude fr. How was nobody else just not understanding what she was talking about
It’s so funny because like there are multiple sentences where I’m like “Yeah so I can define 4 out of the 17 words you said”
What is the volume of the sediment layers around the world?
Good question. I have no idea! While we can map the surface of all the sedimentary layers, it's hard to know the depth of them all at all points.
@@EarthRocks Thank you for your response. My estimate is around 100 million cubic miles and some estimates appear to be about 130 million cubic miles.
@@JungleJargon Funny seeing you here :D
@@BlGGESTBROTHER Just trying to get the information out.
Hey
"Texhas"
"Where large rivers dump their loads" ;)
I have found a meteorite
Yay!
How do you know?
If you could slow down your speech it would help so much!
The beauty of UA-cam is that you can slow it down using the player controls. Click on the settings icon in the lower right and slow it to 0.75 or 0.5!
@@EarthRocks wow, learning something new! Thank you!
This is not simple
Interesting, but way too much information and too many new terms etc to absorb all at once.. needs to be watched lots of times
Great Video! (Jesimiel Millar Fernåndez) 1M1K625