Identifying Metamorphic Rocks -- Earth Rocks!
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- เผยแพร่เมื่อ 25 มิ.ย. 2014
- For an introductory college-level physical geology class: a review of how to classify and identify a metamorphic rock. Includes a discussion of foliation and other clues to look for in a rock to indicate the intensity or grade of metamorphism to which the rock was subjected. Reviews how to identify each of the following rocks, including what the rock used to be (parent rock) and what was the metamorphic setting in which each rock formed: marble, quartzite, hornfels, skarn, migmatite, gneiss, schist, phyllite, slate, serpentinite, eclogite, and greenstone.
**This video comes near the middle of the semester, so there may be terms with which the audience is unfamiliar. In fact, it is recommended that you watch this video only AFTER watching Identifying Minerals, Identifying Igneous Rocks, and Identifying Sedimentary Rocks. This video reviews ALL those rock types and discusses how they transform into a new metamorphic rock. It can be overwhelming if you start first with this video. For a full playlist, refer to the Geology playlists on the Earth Rocks! TH-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! TH-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! TH-cam Channel:
/ @earthrocks .
Thank you!
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The pile of pens... Awesome way to show how foliation occurs. Thank you
Helps a lot in school. My son told me that he got %100 on his test because of this video.
Yay! So happy to hear that. Thanks. :)
Great
The illustration of foliation using pens and pencils is so simple yet the most brilliant metaphor I’ve ever seen
Seriously you need credit
Great info. Professional lecturer. Nice voice. Logical explanation. Easy to remember.
I've always wanted to be able to tell /feel where a rock was formed.. this information you have presented is gold ❤️
This was excellent! I was confused on how rocks change and the explanation on pressure and temperature really helped me understand the process.
The best information on TH-cam to date. Thanks
Beautifully put together! Thank you so much!
Great video with a lot of knowledge I love learning about different rock types how they were formed how heat and pressure can change them and learn all about geology.
This is the best video on metamorphism I have seen. I have extensive chemistry background, so it may be that the way things are explained here makes sense because I think of the world in terms of atoms and their movement and rearrangement. I think this is the most fascinating and helpful video on explaining mineral formation and and metamorphism at an atomic level that I have found, and I've watched upwards of 30 or 40 videos just on this topic. Thank you SO MUCH!
What a fabulous comment. Thanks for sharing your experience! It means a lot. :)
You do a very nice job. Showing the “stuff of geology” helps me to relate to the historical geology! Great graphics, great voice. Very picky professor Bob
it really help me a lot in our activity in geology, thanks for this video
Great video. I wish I had seen it when I was studying geology. Thanks.
I'm a geology student and your videos helps me a LOT!! Thank you :))
You're welcome. Thanks for letting me know. :)
Wish I had seen this as an undergraduate geology student In the late’70s. [encountered all of these on field trips to Assynt area, N.W.Scotland] ...[ serpentine In Cornwall ]
Clear and informative....
Great introduction, Thank you.
Excellent video about metamorphic rocks.... keep make more.....
Thanku you so much, excellent way of teaching... 👌 i have clarified my doubts on this topic
Thank you, sister....you r the best
Ma'am,
Kindly explain about classification of sedimentary rocks based on gneiss with some examples
I'll probably watch this 10 more times just to gain an intimate understanding ha
I've watched it for more than___, I don't know how many times.. i always come here to watch this anytime before an interview or an exam..
As I'm a senior Geological Engineer Graduate. DONE my Undergard Degree 6 years ago.
Me too
@@missemma8504 that's awesome. What do you do with it now? I'm barely only about to earn my Associates in LA with a focus in Math and Science before transferring to an undergraduate program in geology.
Me too lol!
Check out earth science x. It's a complete geology lecture and it's on the same level as this. I think there are 26 videos, going through minerals, igneous, sedimentary, metamorphic, plate tectonics, ground water, soils, volcanoes, mass wasting etc. It's a great TH-cam course if you like geology.
The way u explain the video is amazing...can u pliz make a video on chemographic projections of metamorphic rocks...🙏
Great Vid on Rocks! Geologist like School!! Thank You!!
great lecture, thank you...
I like how you simplified foliation 🌻
Thank you so much for teaching us to , proud to ask our profs. My ignorance has always been my second greatest teacher.
Thanks, brilliant!
This was excellent👍🙂
Thank you for making this video! I am taking Earth Science in school and your lesson has been very helpful!
Glad it was helpful!
thank you!! im from chile, your videos are amazing and very didactic.
This was fantastic thank you
This was amazing thank u I looooove rocks cycles
Tanx 4 such an amazing video.... Helped me a lot
I've recently taken up geology as a hobby, and enjoyed the video, but wow! so much new vocabulary. It's going to be a challenge to internalize it all.
You are right
Same issue. I focus on on understanding and learning one new word per day. Really helps to have a sample in hand to examine closely.
Pen and paper. Take notes 📝
Excellent synopsis.
I've always enjoyed feeling different rocks as a child. ❤️
Excellent video !!!!
Wow...thank you great video of identifying metamorphic rock stone....please process of manganese,iron ores and coal .
Thank you ❤
Kept falling asleep---watched in 3 or 4 segments...cuz it was that informative. But I think another utuber switches the order of phyllite and schist.
God bless you. Just crammed this video before my lab exam and got a 92. 🙌🏼🤘🏼
Yay! Thanks for letting me know. :)
Thanks for putting it out there for folks! Super useful!
Watch this it is outstanding.
Great video. Thanks!
You are great personality of world science mineral
I grew up with a Geological Engineer for a dad. Truly fascinating field. Nice video my mineralogy is sadly lacking.
wonderful video!!
Very informative video.👍
I have a question please.
How are there alternate layers in metamorphic rocks? How is there a black, then light, then black band in Gneiss for example? Is this like nature is also conscious about color combinations.😁 How do they arrange like this?
Density -- the darker minerals are denser than the lighter ones. When the crystals are given some energy through heat, they can move around a bit and will separate in bands by density. We see the same thing with sand grains settling on a hillside.
Hello i appreciate the work done and i was inquiring if there is a rock called tillite
Amazing!
cool!many thanks!!
7 year old video but timeless information.
I know how the metamorphic from but can you do the experiment to identity the metamorphic rock
Thank you, really easy for someone like me who is just beginning to learn about geology.
Glad to hear that!
Nice!!!!!
Hum where I live in Oklahoma we have.
But I’m not Educated on what the topic what you talking. Wish I knew what you are talking about. But what I am Curious about, there is a huge hundred foot plus solid Quartz mountain is what I call it, coming straight out of the ground. Which stands alone,
Great video
Thank 😊 you ,very much Ma'am from "SINGHBHUM CRATON" INDIA 🇮🇳.
It was really helpful.....
hello and good day! Can we use your video for educational purposes? Thanks so much and more power!
Of course. It's creative commons licensed. Just be sure you maintain that license and the attribution: creativecommons.org/licenses/by-nc-sa/4.0/
Thank you so much and more power for more amazing videos. .
This short film clip makes identification extra simple...Almost reveals all the mysteries in geology...
Luv Rocks! wink
So glad you liked it! :)
Thanks a lot ur great....
I have collected a yard full of New Mexico metamorphic rocks. Thanks
why you dont tall about daimonds? are they vulcanic glass?
The slate is beautiful.
7:23 I grew up on too much Bevis and Butthead to not notice you say, "sheety cleavage" huh huh huh
7:05 she also says "slaty" uhuhuh huhuh
I have a couple of rocks that take to a good quality magnet can I send you a picture of so where
I have spent most of my adult life scouring our local deserts in the great Southwest San Diego and Mexicali and Calexico. There are areas that are restricted to all people along the old Butterfield stage Road. I have ventured into these areas with great caution and there are no signs of indigenous habitation. Back in the 1400s it was reported that this area was inundated by the sea of Cortez.
I have found many large Jipson crystals and igneous rocks associated with volcanic activity yet the one element that confounds me are the manganese nodules in small piles strewn about. I sent several samples to be analyzed and they came back as 98% pure manganese the rest being iron.
So my question is, how does manganese nodules form in ancient oceans and seas?
Manganese nodules form on the bottom of the seafloor as waters are supersaturated with dissolved Manganese. It may be you're finding some deposits left behind as old seafloor rocks have eroded/weathered.
Manganese oxides also form as part of the chemical weathering process when minerals dissolve (especially in the desert), but that just creates a stain on the surface (desert varnish).
I bet on the old seafloor deposits. You can see them described in part of my Ocean Sediments video:
th-cam.com/video/COz4XiqmQ1Y/w-d-xo.html
@@EarthRocks my surname is Rocks, and my Christian name is Stephen. So as much as I enjoy Rock hunting, my college degree was in chemistry.
I hear now that industry is looking for manganese deposits in the search for rare earth metals. The samples I turned in for analysis showed two elements, manganese at 99% and iron at one.
So why are they looking for manganese when there is one percent left over as iron and possibly a fraction. And of that could be rare earth.
So what am I missing in this equation? as a neophyte ?
I'm very-very like.
This rocks.
Thanks a lot
Most welcome
How do I differenciate between sedimentary and metamorphic rock
Watch the video on the Rock Cycle: th-cam.com/video/N2BKjELzhfU/w-d-xo.html
That should help. :)
Great 👍 meteorite
I thought converging continent and subduction zone are same. What's the geological difference. I am not asking the difference of pressure and temperature gradient
Continents don't subduct. So when two continents collide, they create massive mountains with deep roots, but no subduction. Only when one of the converging plates has ocean crust at the boundary will there be subduction. I have a video on plate tectonics basics that can help you: th-cam.com/video/2uh8W4vGLQ0/w-d-xo.html
@@EarthRocks our teachers said indian plate is subducted into Eurasian plate and himalayan range is formed. Is that wrong? Please clarify. And thanks a lot for the previous reply. I owe you ma'am.
@@surajpatel3044 Yes, subduction brought two continents together. The subducting Indian plate had continental crust attached to the ocean crust, and once the portion of the plate with the ocean crust had completely subducted, the continental portion collided with Eurasian plate and formed the Himalayas. So subduction brought the two together. See the Plate Tectonics Global Impacts video: th-cam.com/video/Y5aMnRGVp_8/w-d-xo.html (look at 7:14 onward).
And you're welcome. :)
Thanx
i will just said thank you
You sure cover a lot of territory in your 15 minutes videos!
Cool.
i agree
great
i live in an area full of glacial till. ten random rocks still takes me hours. geology is incredibly complex, i discovered.
great >>>>> greaaaaaaaaaaaat, thanks alot
great
👌
I have a specimen that I need some help identifying. Could you help me, if I send a picture? Not sure if it is a schist or Gneiss.....
Send it on. :) You can find my email address by Googling me: Katryn Wiese.
My e-mail sent, was rejected. Thanks for any help.....Roger
Sorry about that. My email has been having problems the last week, and I have no idea why. Try emailing kwiese@ccsf.edu.
Thanks ....Will do.
Wait you just saved my whole quarter
You’re awesome
As a recent rockhounder, I had hoped this video might be a knowledge resource.
Now I know, " understanding" what you are sharing, is not the least bit helpful.
But thanks for your time.
Graciaaaaaaaas!!!!!!!!!
I'm going to look at marble flooring with new eyes now
skarn is a rock or a type of mineral deposit
aklepatzky non-foliated rock...5:34👍
This video rocks!
Metamorphic rocks are evolutionary.
❤️❤️❤️👍⭐👍
07:00 slate
LUOA gang!
geologist for sure
Wholly Mountain Building Batgirl!!!
Quartz be like: I am the most useful thing on this planet :3
Chert rocks feel a lot like tooth enamel
so if a rock has foliation, it's always a metamorphic rock?
Not necessarily, but usually. Sedimentary rocks can have layering, and as pressure is added, that layering can turn to foliation (the clay minerals in the sediment align). So some sedimentary rocks that are grading into metamorphic through addition of small amounts of pressure can be foliated. But that's a gray area (the zone when sedimentary turns into metamorphic).
thank you!
My name is skarn, Michael Skarn
Dolemite is the baddest rock. Remember kids no matter what happens, you do not mess with Dolemite.
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