found a nice chunk of something, not sure what but it flakes well.

Discussion in 'Primitive Tools' started by GingerBeardMan, Aug 15, 2019.

  1. GingerBeardMan

    GingerBeardMan Tracker

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    Hey all! I'm in CO so I thought this was an interesting find. So far it's been kinda hard to find flints and cherts where I live, but I've found this one. Could be Jasper? I know that's the majority of the chert around the front range. Any ideas what this is? or how to break up that weird shape.
     

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  2. pellegrino

    pellegrino Much to learn... Bushcraft Friend

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    That's really interesting. My first thought was a black chert, but I am terrible at rock ID. :)
     
  3. GingerBeardMan

    GingerBeardMan Tracker

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    Whatever it is its considerably harder than glass. I wish I had some flint to compare it to.
     
  4. NevadaBlue

    NevadaBlue —- Roughian #7 -— --- Graybeard -— Supporter Bushcraft Friend Bushclass I

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    Let’s test it. Will steel scratch it (try an ordinary nail), then see if it will scratch glass.
     
  5. NevadaBlue

    NevadaBlue —- Roughian #7 -— --- Graybeard -— Supporter Bushcraft Friend Bushclass I

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    These little charts can be useful.

    [​IMG]

    [​IMG]

    Remember on that second one, a COPPER penny, not a new zinc/copper plated one. Where the second one says ‘orthoclase’, read FELDSPAR. You have lots of it in Colorado, it is a part of most granites you will see. It is fun to make up a kit of the common minerals and things like a nail and copper penny for testing in the field.
    A bit of ceramic (like a broken tile) can also help with mineral ID. The color of a streak on white ceramic is telling.
     
  6. doanehead

    doanehead Scout

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  7. NevadaBlue

    NevadaBlue —- Roughian #7 -— --- Graybeard -— Supporter Bushcraft Friend Bushclass I

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    Flint is kinda/sorta microcrystalline quartz for reference.
     
  8. GingerBeardMan

    GingerBeardMan Tracker

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    That is a handy couple charts!

    There is an absolute ton of granite and semi fine grit stone around here, but so little fine grit, its maddening. I think it's just where I am specifically, I know theres good jasper and some dacite here.

    I might just go up to Wyoming and grab some flints from the limestone chunks on the prairie. I used to trip over the stuff up there.
     
  9. EXPLORATORAUDACTER

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    that is igneous rock, almost sure that is basalt I have some samples that look just like that, do you know if there is any volcanoes in the region you found that?
     
  10. EXPLORATORAUDACTER

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    Here is some samples so you can compare, hope it helps
    IMG_2040.jpg
     
  11. GingerBeardMan

    GingerBeardMan Tracker

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    Most like the one on the left. It's smoother than most of the basalt I found, but unlike flint it's not translucent, and it's not as shiny as my obsidian.

    So I've been collecting rocks from the volcanic landscaping filler rocks that my apartment complex uses, mostly they are dark and very sparkly, medium grit, fragile and fractures unpredictably. I dont know what it's called. Theres also some granite and some quartzite sprinkled in. This is the only piece I've found of this material.

    It reminds me of sturdy shale, and I thought it could be dacite, but it might just be really smoother fine grit basalt. It's not very heavy though.

    Funny thing is I've been looking primarily for a lozenge shaped chunk of basalt to make a celt or adze with.
     
  12. ywaltzucanrknrl

    ywaltzucanrknrl Tracker

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    I can't get enough detail from the pictures to tell for sure. If I could look at it with my loop, I could tell for sure...HA! It appears to be a low grade chert---reason I say that is because it has better conchoidal fractures than most volcanics with the exception of obsidian and a few others. The inclusions seen in the fourth picture are also indicative of chert and it also appears to have the micro-crystalline habit of low grade chert.
    If you found it in northern Colorado, odds are it's chert, southern Wyoming and northern Colorado don't have much in the way of volcanics.
     
  13. CSM1970

    CSM1970 Supporter Supporter

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    Do you live anywhere near Golden, CO? If so, go to visit the Colorado School of Mines Geology Dept. and the mineral Museum in particular. It used to be in Berthoud Hall but it may have moved. Try to contact one of the people who work there and ask them where to find flint or chert. They were always very helpful when I was a student there.
     
  14. Beach Hiker

    Beach Hiker LB 42 Supporter

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    @GingerBeardMan
    Are you sticking around?
    You're beard is tremendous and one of my colleagues will surely nominate you for the bench.
    No, don't ask.
     
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  15. pellegrino

    pellegrino Much to learn... Bushcraft Friend

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    There's an awesome youtube channel and podcast (Earth and Environmental Sciences podcast) by a CSoM Geology professor. I have been listening to a lot of that lately. I remember he mentioned this museum in one of his episodes.
     
  16. GingerBeardMan

    GingerBeardMan Tracker

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    I always forget about the school of mines, like a true fool! That is a great idea!

    Boy not asking is definitely gonna be hard haha!

    I am sticking around, both in CO and on this board.

    Thar sounds interesting!
     
  17. CSM1970

    CSM1970 Supporter Supporter

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    Ha! Thought your beard was a family of hamsters! My bad.
     
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  18. GingerBeardMan

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    The real thing is about as dense as hamsters. Ironically, I have a very thick red beard, my name is a double pun and reference and for that sin I apologize haha
     
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  19. OrienM

    OrienM Guide

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    Looks dacite-ish to me...don't need to know what they are in order to work 'em, though :cool:
     

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