Last Updated
：2025/11/21
pleochroic halo
（ plural ）
（ plural ）
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(geology) A microscopic spherical region in which there is a change in colour from the surrounding mineral; due to radiation damage from alpha particles.
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pleochroic halo
Under the petrographic microscope, the thin section revealed a distinct pleochroic halo around the zircon inclusion.
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Under the petrographic microscope, the thin section revealed a distinct pleochroic halo around the zircon inclusion.
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