A technique for measuring 3D crystal-size distributions of prismatic microlites in obsidian

@inproceedings{Castro2004ATF,
  title={A technique for measuring 3D crystal-size distributions of prismatic microlites in obsidian},
  author={Jonathan M. Castro and Katharine V Cashman and Michael Manga},
  year={2004}
}
We describe a technique for determining the 3D size, shape, and number density of prismatic microlites in obsidian. The procedure involves collecting a series of optical photomicrographs at successive levels in a transparent thin section with a petrographic microscope and digital camera. These images are combined to form 3D stacks with NIH Image software. The number, position, orientation, and projection length of each microlite in the stack are then determined, and these data are used to… CONTINUE READING

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