Bipolar Percussion

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  • Опубліковано 1 лют 2014
  • 13/21 This video is part of a series of educational videos on flintknapping for ANTH 3201 Lithic Analysis taught by Dr. Julie Cormack at Mount Royal University. These videos were produced by the Media Production Team at MRU. The conceptual idea and project organization came from Julie Cormack. In this video, archaeologist Jason Roe uses bipolar percussion to split pebbles in half, thus creating a working edge for further knapping.

КОМЕНТАРІ • 26

  • @KnapperJackCrafty
    @KnapperJackCrafty 10 років тому +23

    Interesting to see/hear this demonstration of cobble splitting from an archeologist's point of view. :-)

    • @arcadioflores8982
      @arcadioflores8982 6 років тому +1

      the anvil stone needs to be flat i do bipolar purcussion all the time because my local chert thamy people use/used is rounded by the ocean in santacruz california so use a flat anvil stone and a pestle shaped hammer stone

    • @arcadioflores8982
      @arcadioflores8982 6 років тому +1

      and i c the stone is flat the cobnle will not slip as much

    • @Rockhoundingcolorado
      @Rockhoundingcolorado Рік тому

      You explained what is going on here, I'm in the San luiz valley, I find the split pebbles, I have arrowheads, made from split stones, I have stones that blew up while this was done to them. And I have the hammer stone they used, I'm going to dig for the anvil. I have found arrowheads, all over america. But I have never found the archaic artifacts I have found here? Another strange thing, is they used chips, but They struck the chip in such a way, as to make a flake a one sided point, that has three little triangles parts to them. Hard to explain. But I also find Black Jasper, that was the shape they wanted without knapping it. But one edge will be sharpened? They litterly used whatever they picked up out here, And what is here is small stones only. Good material like obsidian, brecceatted jasper, Very pretty stuff mostly, like they knew it was special?
      The reason I am finding all this stuff, is 2 years ago, The landowners, sold water rights. So wetlands that have beenb estuaries for migratory birds for millenia, are now dry. They sold the water that used to flood this area, for miles. SO What seems a harsh lifestyle, was pretty good.

    • @Rockhoundingcolorado
      @Rockhoundingcolorado Рік тому

      Sorry have to roll my post up, won't read more.

  • @ElizabethGreene
    @ElizabethGreene 2 роки тому

    Thank you, UA-cam. This recommendation is a fantastic lead-in to the entire ANTH3201 series. 10/10.

  • @redtobertshateshandles
    @redtobertshateshandles 3 роки тому

    I will be checking local broken stones for tell tales of having been knapped. Thanks

  • @PyroFalcon
    @PyroFalcon 2 роки тому +1

    Now we know what happened to his fingertip 😉 Great video

  • @csluau5913
    @csluau5913 Рік тому

    I’ve watched quite a few videos on bipolar flaking, and I finally realize something fantastic recently. I actually discovered a couple of anvil stones at an archaeological site, and in the spirit of experimental archaeology (and trying to learn about our ancestors), I used one of the stones with another large river cobble as the anvil and hammer to split quartzite pebbles. I was able to make a biface with an even centered edge all the way around, using nothing but bipolar percussion. I was able to control it relatively well, and depending on the angle, when I hit the pebble it would cause the flakes to pop off of the opposite end, or the end that I was striking from both sides. I was delighted when I had finished with it, and it gave me a lot of understanding about some of the artifacts I have recovered from this area.

    • @bracoop2
      @bracoop2 Місяць тому +1

      Amble stone? I think you mean anvil.

    • @csluau5913
      @csluau5913 Місяць тому

      @@bracoop2 yes, indeed. Thanks for noticing. I have corrected the typos. Anvils!

  • @johnmartin6140
    @johnmartin6140 6 років тому +1

    I have really enjoyed watching and learning from the great teacher and flintknapper Jason Roe.....I hope to see more of his videos.....if you could tell me how to do this, please let me know....thanks.

  • @theperfectbanjo8610
    @theperfectbanjo8610 Рік тому

    Thanks great information

  • @rendrag156
    @rendrag156 4 місяці тому

    My man is missing fingers. I'm gonna use a hammer and a vice with a hard backing, lol.

  • @davidperry5631
    @davidperry5631 8 місяців тому

    I was just thinking about what he would say when he smashes his hand.

  • @francismarcoux8944
    @francismarcoux8944 5 років тому

    Make yourself a paire of tweesers to hold the cobble. Wiyjba split branche

  • @thefeatheredfrontiersman8135
    @thefeatheredfrontiersman8135 3 роки тому

    How can this be implemented with regular flintnapping? You have given me a few ideas.

  • @bigtrout
    @bigtrout Рік тому

    Just ran across this almost 9 year old video & really interested as I've found numerous "suspect" scrapers of similar quartzite river cobble. This really lends some credibility that what I've found is perhaps not natural chips. What I WOULD very MUCH like to see is once this bipolar break is made, where does it go from here, i.e. knapping the other side to make a tool? Can anyone point me to a video?

  • @ThomasSmith-os4zc
    @ThomasSmith-os4zc Рік тому

    Early man knew this over two million years ago.

  • @claybowman1242
    @claybowman1242 Рік тому

    The beginning could be an album cover

  • @thatsmallrockshop
    @thatsmallrockshop 7 років тому +1

    lol we meet again mr crafty.lol

  • @Rockhoundingcolorado
    @Rockhoundingcolorado Рік тому

    I have pounds of these tools from colorado..

  • @champuroy3551
    @champuroy3551 2 роки тому

    Aisa pathar mere pass bahut hi Vicky Karega customer ne mil rahe

  • @emdee7744
    @emdee7744 2 роки тому

    More demo, less preamble.

  • @runingblackbear
    @runingblackbear Рік тому +1

    Your doing it wrong

  • @jamebrooke894
    @jamebrooke894 8 місяців тому

    Wouldn't a Nutting stone with it's round hole work ??