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Recent content by PennyPong

  1. P

    Identification of what my wife believes isn't a rock

    Oh my, I completely overlooked that. Now I am considering having that side polished to bring out that layering. Thank you for that observation!
  2. P

    Identification of what my wife believes isn't a rock

    I agree with you about the mechanism for the shape. A big clue (to me, at least) is the shiny opposing sides vs. the dull, "interior" sides, also opposing. That would suggest a slab that broke along lines that created the cross-section shape. Although there appear to be thin, reflective...
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    Identification of what my wife believes isn't a rock

    "Most columns tend to have 5 or 6 sides but have as few as 3 and as many as 7 sides." https://volcano.oregonstate.edu/columnar-jointing There seems to be no agreement between my sources as to how many sides it can have, but all agree that it can be as few as three. Thus, it does not rule out...
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    Identification of what my wife believes isn't a rock

    The relative has fired up the Internet to retake the lead, it seems. The output of this work has produced a reference to olivine. Any thoughts?
  5. P

    Identification of what my wife believes isn't a rock

    Your photo of the green hornfel was intriguing because of similarities in the color and grain. That it could be created from columner basalt is very convincing. I like your idea the best so far. Also, it makes a better story when I bring it to parties. Well done!
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    Identification of what my wife believes isn't a rock

    Interesting. Could the hornfel be formed from columner basalt? Would that explain the shape?
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    Identification of what my wife believes isn't a rock

    I refer to her as my "Commander in Chief" and that keeps me well
  8. P

    Identification of what my wife believes isn't a rock

    A relative did quite a bit of research on my behalf. She suggested that it could be columnar basalt formed by volcanic action. I did some reading up on this and I believe this is a strong candidate, if not the actual ID. This also convinced the wife that it is an actual rock and not...
  9. P

    Identification of what my wife believes isn't a rock

    While planting a rose in our somewhat rocky soil, I encountered an interesting rock. My wife was not convinced that it is, in fact, a rock because of the shape. So, to my horror, she banged it a couple of times on another, larger rock but fortunately did not break it. It has a diamond-shaped...
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