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Volcanic Glass Phenocryst (Under Plane Polars)
Slide: BH-51 
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Volcanic Glass Phenocryst (Under Cross Polars)
Slide: BH-51 
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Volcanic Glass Rings (Under Plane Polars)
Slide: BH-51 
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Volcanic Glass Rings (Under Cross Polars)
Slide: BH-51 
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