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Found 2 results

  1. Shocked or Tectonic?

    Something keeps telling me to look further, but I believe this is part of answering how big of an event happened here. This stone was pulled from a vein that was sandwiched in a softer than limestone but more like granite. Sorry no picture of that. I was intrigued by the crystal structure of the crystals that had been knocked free by free range cattle and deer. My first thoughts were of petrified wood since it's literally just about everywhere if you look. But I could not figure out in the world a piece of wood might petrify, #1 clear #2 with opposing angles. These pieces did not seem to fit with the typical crystallization of quartz. The area does have examples of tectonic uplift, whether it was impact or explosive I've yet to understand. By using the scope I can see that there was a whole lot of smashing going on, shockwave from a meteorite would absolutely do it. Would also explain other pieces that still need some up close treatment. I have to change lighting and stage almost every specimen though. I only got through 4 or 5 in a whole day. pic #1 Really thought it was just an interesting piece of quartz, polish one end (soft like calcite, powdered easily, chips into a gazillion pieces) and the clarity is astonishing, you can easily see clean through like glass. With the light just right you can see a what looks like a haze that runs in the center of it. Looks very much like a light layer of smoke. Proximity to the shocked/tectonic pieces, maybe 800ft. pic #2 is a piece of shocked/tectonic quartz that is blackened on the outer surface, I'm guessing a flash of heat but certainly not brush because there is literally almost nothing there. I broke a section clean to analyze under the scope, you can see the opposing grain vs the natural crystallization, with the naked eye. It does take some reflection technique using the sun to illuminate the patterns. Up close under the scope, @80x you can see how the original crystallization was shocked. pic #3 Is the surface of pic #1 also @80x. Really thought the crystallization on the surface was quite interesting, but even more than that. Why is there no visual evidence of similar crystallization on the interior? pic #4 Is the top portion (of pic #2) that was exposed at the surface of the vein. I chipped this piece out with a hammer. @80x, illustrates the burning, sort of looks like it stuck it's face in a blast furnace to me. I have one more absolutely amazing piece that has a shocked/tectonic layer (I think shocked) that you cannot see with the naked eye. It was sandwiched in a "concretion" -lol hates that term. I'm still trying to figure it out though. All I need is a better image. Tomorrow maybe I'll try the good ole' sun and see what I can get of it. Images taken @80x using Nikon D5500 mounted to Amscope T700A via DIGICAMCONTROL (freesource software)
  2. Cambrian Tectonic Plates

    Anyone have any information on tectonic activity during the Cambrian Period? I am writing a report on tectonic activity on Earth and am going to use the Cambrian to explain the location of the Burgess Shale and Chengjiang formations. So far I have a good idea of what I am doing, just wanted some input from others. I'll reference anyone that responds. Thanks.
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