Identifying Metamorphic Rocks -- Earth Rocks!

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! KZbin 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! KZbin 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! KZbin Channel:
/ @earthrocks .
Thank you!

[@kattiannavaughn6942]

The pile of pens... Awesome way to show how foliation occurs. Thank you

[@jjcvmd]

The illustration of foliation using pens and pencils is so simple yet the most brilliant metaphor I’ve ever seen

[@chrisavila8693]

Seriously you need credit

[@nickolaykolev8986]

Helps a lot in school. My son told me that he got %100 on his test because of this video.

[@EarthRocks]

Yay! So happy to hear that. Thanks. :)

[@sherali9383]

Great

[@reneewishek2035]

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!

[@EarthRocks]

What a fabulous comment. Thanks for sharing your experience! It means a lot. :)

[@koikogo]

Great info. Professional lecturer. Nice voice. Logical explanation. Easy to remember.

[@aoconnor2933]

I'll probably watch this 10 more times just to gain an intimate understanding ha

[@missemma8504]

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.

[@bobketteringham4779]

Me too

[@aoconnor2933]

@@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.

[@georgemcconnell5405]

Me too lol!

[@georgemcconnell5405]

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 KZbin course if you like geology.

[@skylark1848]

I've always wanted to be able to tell /feel where a rock was formed.. this information you have presented is gold ❤️

[@nunyabiznes4471]

This was excellent! I was confused on how rocks change and the explanation on pressure and temperature really helped me understand the process.

[@carlamaeterrado8777]

I'm a geology student and your videos helps me a LOT!! Thank you :))

[@EarthRocks]

You're welcome. Thanks for letting me know. :)

[@botryoidalbishhh3150]

The best information on KZbin to date. Thanks

[@WiekingderViking]

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

[@orenmaco]

Beautifully put together! Thank you so much!

[@IrishAndy001]

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.

[@raieyahya8350]

it really help me a lot in our activity in geology, thanks for this video

[@greglaroche1753]

Great video. I wish I had seen it when I was studying geology. Thanks.

[@emmacarina73]

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....

[@explorewithmarcus]

Great introduction, Thank you.

[@mafic_taco7061]

Great video. Thanks!

[@unavoidablycanadian397]

7 year old video but timeless information.

[@subtle0savage]

Excellent synopsis.

[@spectator59]

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.

[@supritisingha7909]

You are right

[@oscarmedina1303]

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.

[@SimonSozzi7258]

Pen and paper. Take notes 📝

[@samuelbrown6249]

Thank you for making this video! I am taking Earth Science in school and your lesson has been very helpful!

[@EarthRocks]

Glad it was helpful!

[@bhavatharani7412]

Excellent video about metamorphic rocks.... keep make more.....

[@skylark1848]

I like how you simplified foliation 🌻

[@praveenprince1313]

Thanku you so much, excellent way of teaching... 👌 i have clarified my doubts on this topic

[@billallen275]

I grew up with a Geological Engineer for a dad. Truly fascinating field. Nice video my mineralogy is sadly lacking.

[@nunyabiznes4471]

This was excellent👍🙂

[@stephenrocks7004]

Thank you so much for teaching us to , proud to ask our profs. My ignorance has always been my second greatest teacher.

[@skylark1848]

I've always enjoyed feeling different rocks as a child. ❤️

[@JulesAnthonyLaCroixPhotoArt]

Great Vid on Rocks! Geologist like School!! Thank You!!

[@brento2890]

Excellent video !!!!

[@angshumanchangmai8074]

Tanx 4 such an amazing video.... Helped me a lot

[@antientdude1100]

great lecture, thank you...

[@valentintranaman4232]

thank you!! im from chile, your videos are amazing and very didactic.

[@smritikonadas5734]

Thank you, sister....you r the best

[@amonglaao5116]

The way u explain the video is amazing...can u pliz make a video on chemographic projections of metamorphic rocks...🙏

[@memoryrinehart4452]

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.

[@Alexpur817]

God bless you. Just crammed this video before my lab exam and got a 92. 🙌🏼🤘🏼

[@EarthRocks]

Yay! Thanks for letting me know. :)

[@Alexpur817]

Thanks for putting it out there for folks! Super useful!

[@maatarinidigital6517]

Ma'am, Kindly explain about classification of sedimentary rocks based on gneiss with some examples

[@spityterry]

wonderful video!!

[@irenenl4035]

Thanks, brilliant!

[@jaquelinepaul7384]

This was fantastic thank you

[@jpguzman924]

This was amazing thank u I looooove rocks cycles

[@larryherrera]

Amazing!

[@nimeiriraja9600]

Thank you ❤

[@wak-asahan4451]

Wow...thank you great video of identifying metamorphic rock stone....please process of manganese,iron ores and coal .

[@kingme79]

7:23 I grew up on too much Bevis and Butthead to not notice you say, "sheety cleavage" huh huh huh

[@CommanderHayes]

7:05 she also says "slaty" uhuhuh huhuh

[@rcosen]

cool!many thanks!!

[@debbiramsey4603]

Watch this it is outstanding.

[@pukhrajmansion8445]

You are great personality of world science mineral

[@melonlord8766]

I know how the metamorphic from but can you do the experiment to identity the metamorphic rock

[@happycool8083]

Nice!!!!!

[@geologist5838]

Great video

[@larryherrera]

The slate is beautiful.

[@user-qy4wb3lq6k]

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?

[@EarthRocks]

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.

[@caseyblakely5327]

Thank you, really easy for someone like me who is just beginning to learn about geology.

[@EarthRocks]

Glad to hear that!

[@musherurebrighton5982]

Hello i appreciate the work done and i was inquiring if there is a rock called tillite

[@MyButtercup]

I have collected a yard full of New Mexico metamorphic rocks. Thanks

[@vdoraiburu1696]

Thank 😊 you ,very much Ma'am from "SINGHBHUM CRATON" INDIA 🇮🇳. It was really helpful.....

[@geraldinesera8915]

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.

[@lindadechiazza2924]

This short film clip makes identification extra simple...Almost reveals all the mysteries in geology... Luv Rocks! wink

[@EarthRocks]

So glad you liked it! :)

[@Haider1963]

Thanks a lot ur great....

[@alanouda5607]

Thanks a lot

[@EarthRocks]

Most welcome

[@StereoSpace]

You sure cover a lot of territory in your 15 minutes videos!

[@mmercier0921]

i live in an area full of glacial till. ten random rocks still takes me hours. geology is incredibly complex, i discovered.

[@agustinuswodon6864]

I'm very-very like.

[@cheerybellerellegue8309]

hello and good day! Can we use your video for educational purposes? Thanks so much and more power!

[@EarthRocks]

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/

[@maamchaeyrelleguedocheires5684]

Thank you so much and more power for more amazing videos. .

[@lyda9335]

Great 👍 meteorite

[@mineralstones5161]

why you dont tall about daimonds? are they vulcanic glass?

[@chrisavila8693]

Wait you just saved my whole quarter

[@chrisavila8693]

You’re awesome

[@jerrywaters4814]

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,

[@skylark1848]

I'm going to look at marble flooring with new eyes now

[@lynnmitzy1643]

Thanx

[@carminetocco9334]

I have a couple of rocks that take to a good quality magnet can I send you a picture of so where

[@LardGreystoke]

This rocks.

[@shenglim2184]

great

[@stephenrocks7004]

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?

[@EarthRocks]

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: kzbin.info/www/bejne/eYDdZYufptKEZ7s

[@stephenrocks7004]

@@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 ?

[@krishnauppar380]

👌

[@stephaniecho6649]

Cool.

[@happycool8083]

i agree

[@amiebadjie216]

great

[@amiebadjie216]

i will just said thank you

[@rocksdonteat6210]

Metamorphic rocks are evolutionary.

[@maokisaseane8589]

How do I differenciate between sedimentary and metamorphic rock

[@EarthRocks]

Watch the video on the Rock Cycle: kzbin.info/www/bejne/hGOlfJ17gd-bnLc That should help. :)

[@eltorigy4411]

great >>>>> greaaaaaaaaaaaat, thanks alot

[@gonix25]

Graciaaaaaaaas!!!!!!!!!

[@2HHB]

07:00 slate

[@rogercotman7285]

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.....

[@EarthRocks]

Send it on. :) You can find my email address by Googling me: Katryn Wiese.

[@rogercotman7285]

My e-mail sent, was rejected. Thanks for any help.....Roger

[@katrynwiese190]

Sorry about that. My email has been having problems the last week, and I have no idea why. Try emailing [e-mail].

[@rogercotman1314]

Thanks ....Will do.

[@trptrungblogs]

❤️❤️❤️👍⭐👍

[@surajpatel3044]

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

[@EarthRocks]

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: kzbin.info/www/bejne/aKbLaYpqq6x_h5I

[@surajpatel3044]

@@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.

[@EarthRocks]

@@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: kzbin.info/www/bejne/j2bEfqGIfLujlZo (look at 7:14 onward). And you're welcome. :)

[@fahimrezwankhair7344]

This video rocks!

[@aklepatzky]

skarn is a rock or a type of mineral deposit

[@lynnmitzy1643]

aklepatzky non-foliated rock...5:34👍

[@tannerwolters5462]

Quartz be like: I am the most useful thing on this planet :3

[@sliceoflife8107]

My name is skarn, Michael Skarn

[@TheMrdoc26]

Wholly Mountain Building Batgirl!!!

[@aliwaqas2396]

geologist for sure

[@trashtalkerakogamingyt6303]

0:17

[@noahsleights53]

LUOA gang!

[@skylark1848]

Chert rocks feel a lot like tooth enamel

[@hurtshaleagleview5322]

Dolemite is the baddest rock. Remember kids no matter what happens, you do not mess with Dolemite.

[@williamsohveymah5550]

Minerals aren't like pens. Sand would be better for illustration. Awesome video. As Shawn Willsey calls them a general term, sexy rocks 😂

[@EarthRocks]

Thank you for your feedback. 😀 Note: unfortunately sand wouldn’t show foliation. It’s equidimensional. To see foliation, you need an elongated mineral like actually actinolite or kyanite or hornblende. These have shapes similar to pens. Or flat planes like micas (and paper). Only these will align when put under pressure.

[@AwytsmVroom]

if anyone knows what destiny 2 is the person speaking sounds like ADA-1! XD (i'm not making fun of them)