Figure 1-1. Palisade calcite. Note the straight parallel crystal boundaries (arrows) between long crystals with nearly identical crystallographic orientations. Some crystal boundaries are visible in a corresponding plane-polarized light image, but the non-linear crystal boundary at right disappears in plane-polarized light. Photomicrograph was taken in cross-polarized light; field of view is 2.4 mm wide. Carlsbad Cavern, New Mexico; Georgia Giant Stalagmite; thin section CB6. Sample collected by George A. Brook.
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