How to identify rocks, a geologist explains.

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  • @MichiganRocks
    @MichiganRocks 2 роки тому +5

    I thought I should come take a look at one of your videos since you're an actual geologist, not just some guy stumbling around on a beach looking for pretty stuff to polish up. I enjoyed the video. Thanks!

    • @geologyjohnson7700
      @geologyjohnson7700  2 роки тому +4

      Thanks! I started off stumbling on a beach, then did some stumbling at uni so I got a certificate. There's not much difference otherwise! :D

  • @Linandemma
    @Linandemma Місяць тому

    Only just tripped over your channel. I love geology but have been watching Nick Zentner, Shawn Willsey, and Myron Cook, for example. Also, there are a lot of USA GS channels. But I'm still looking for stuff about England (not just Scotland). I'm glad I've found you. You sound very good.

  • @muzikhed
    @muzikhed 2 роки тому +1

    Flint ( Chert ) is one of my favourite rocks, it just fascinates me that something so perfectly glassy could have been formed chemically and appear so similar to Obsidian which is another of my favourites but which is quickly cooled magma. I would like to know more about Chert as you quickly mentioned open-cells/grains and left me wondering. I like what you say about rocks being pages in a book.

    • @geologyjohnson7700
      @geologyjohnson7700  2 роки тому +2

      Chert is fascinating and can tell us a lot about ancient environments. It looks like obsidian and pitchstone because they have homogenous ingredients which gives them similar properties like conchoidal fracture.

  • @DavidJLevi
    @DavidJLevi Рік тому +1

    I think that I know where that rock formation is in your musical intro at 1.15. It's at Porth Lleuog in Pembrokeshire, just around the Trwynhwrddyn headland at the north end of Whitesands Bay. You can get right up to those rocks at low tide which I do everytime I go there.
    I've just discovered your channel and stopped watching the first video I came across (What is granite?) in order to subscribe and start from the beginning of your videos so as not to miss any info.

    • @geologyjohnson7700
      @geologyjohnson7700  Рік тому +2

      Well spotted, that is exactly where it is from! Some of my favourite geology in Pembrokshire!

  • @Angela-jm5zx
    @Angela-jm5zx 8 місяців тому

    Awesome information. Thank you so much!! ❤

  • @psilosimon613
    @psilosimon613 2 роки тому +2

    Excellent video, thanks.

    • @geologyjohnson7700
      @geologyjohnson7700  2 роки тому

      Glad you liked it. I should probably do an updated version soon though.

  • @rowanoraclereadings
    @rowanoraclereadings 5 років тому +1

    Brilliant work, Brooke. Very informative. Mind blown! I'll never look at a shopping centre floor the same way again!

    • @geologyjohnson7700
      @geologyjohnson7700  5 років тому +1

      Thank you! Be careful tho, I've walked into so many people! XD

    • @muzikhed
      @muzikhed 2 роки тому +1

      I once went to an Art Gallery with the most amazing fossil full marble floor and instead of the paintings I found myself studying the stairs and floor on my hands a knees feeling quite ridiculous but practically unable to drag myself away, for a while at least.

  • @mariesbones436
    @mariesbones436 5 років тому +1

    Great first video, very excited to see the coming ones bae 😘!!

  • @jamesmneenan
    @jamesmneenan 5 років тому +1

    Could you put your social media links in the video description, Brooke?

  • @almostnospecifics
    @almostnospecifics 5 років тому

    What's the soundtrack? Also really enjoyed this - don't know anything about rocks, so learnt LOTS! It's amazing what you can tell about a rock and where it came from just from looking at it!

    • @geologyjohnson7700
      @geologyjohnson7700  5 років тому +1

      Thanks! Music is just stuff I made to go with these videos.

  • @mistynelson1526
    @mistynelson1526 9 місяців тому

    I have some cool rocks. I would love to show you. But alas, I am unable to share it in this post. Thank you

  • @geoffgeoff143
    @geoffgeoff143 9 місяців тому +1

    How did marine fossils get on top of Mt Everest?

    • @gorl9149
      @gorl9149 9 місяців тому +1

      plate tectonics

    • @geologyjohnson7700
      @geologyjohnson7700  8 місяців тому

      As Gorl says, plate tectonics. When India colided with Asia, slices of bedrock were pushed up onto the land, some of those rocks were originally mud on the bottom of the sea, but now they are the top of a mountain chain.

  • @richardthomas4866
    @richardthomas4866 5 років тому

    We love you Brooke!!

  • @MelvinBandao-fu5jr
    @MelvinBandao-fu5jr 4 місяці тому

    Sir, is basalt rock has a melting fusion?

    • @geologyjohnson7700
      @geologyjohnson7700  3 місяці тому

      I'm not sure what this question means, can you try rephrasing it?

  • @mistressofstones
    @mistressofstones 6 місяців тому

    Why are there so many amazing minerals in that town? Was that a wall made of larvikite?? 😮

    • @geologyjohnson7700
      @geologyjohnson7700  6 місяців тому +1

      It's cos off the Uni has a lot of money. Yup, the supermarket is made of larvikite!

    • @mistressofstones
      @mistressofstones 6 місяців тому

      @@geologyjohnson7700 that's AMAZING 👏

  • @jlo1195
    @jlo1195 Рік тому

    Yo I found this little pebble and it has a perfect line engraved all around it but does not connect and it’s magnetic. I should have a video of it on my channel.

    • @geologyjohnson7700
      @geologyjohnson7700  Рік тому

      Fascinating! My first guess is it looks like it could be magnetite and ilmenite rich basalt. But it could be lots of things and without being able to examine in person, or knowing the exact location it's from, it's difficult to say.

  • @kimjosephenerlan3320
    @kimjosephenerlan3320 8 місяців тому

    Sir good day me I question what kind of rock is melting of an acetilen

    • @geologyjohnson7700
      @geologyjohnson7700  6 місяців тому

      I'm not sure what an acetilen is. Can you describe it and maybe I can help?

  • @stevo728822
    @stevo728822 4 роки тому

    Does molten rock count as a 3rd kind of rock with no crystals or grains?

    • @geologyjohnson7700
      @geologyjohnson7700  4 роки тому +1

      Hmmm, I'm going to say no as a rock needs to be solid and made of mineral crystals or mineral grains. Once it gets near the surface though, magma (lava once it reaches the surface) will have crystals forming or already formed in it, in which case you could start referring to it by it's primary composition e.g. a basaltic magma/lava, andesitic magma/lava etc.

  • @midorixi
    @midorixi 5 років тому

    So cool, congrats! I'm a graduate geology Master student, greetings from Italy

    • @geologyjohnson7700
      @geologyjohnson7700  5 років тому +1

      Thanks! Glad you are enjoying them. What is your masters project about?!

    • @midorixi
      @midorixi 5 років тому +1

      @@geologyjohnson7700 I'm studying georesources and geomaterials, very interesting!
      And you? Are you doing a PhD?

    • @geologyjohnson7700
      @geologyjohnson7700  5 років тому +1

      Exciting! Yes, I am doing a PhD in precambrian sediments

  • @teresamotley8352
    @teresamotley8352 Рік тому

    I need someone to identify a rock of which nobody else today has been able to tell me what it is, can you I can send a picture inside and out of the rock.
    If you can give me a page to send it to

    • @geologyjohnson7700
      @geologyjohnson7700  Рік тому

      Yeah, you can send it to my facebook page, or I should have a contact email in my about page here. As well as clear pictures with a scale (like your hand or a coin) I need to know where you found the rock with as much detail as possible about the area.

  • @parkinson1963
    @parkinson1963 2 роки тому

    There are only two types of rocks. Skippers and kerplunkers. Geology 101

    • @geologyjohnson7700
      @geologyjohnson7700  2 роки тому +1

      We call them skimmers and spladooshers where I'm from. I also once got a spladooser to skim!

    • @parkinson1963
      @parkinson1963 2 роки тому

      @@geologyjohnson7700 perfect description.