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Ranger Robb: Diorite, Twentynine Palms Visitor Center, CA
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Ranger Robb: Pegmatite, Twentynine Palms Visitor Center, CA
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Ranger Robb: Porphory, Twentynine Palms Visitor Center, CA
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Ranger Robb: Quartz Monzonite, Twentynine Palms Visitor Center, CA
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Ranger Robb: Quartz, Twentynine Palms Visitor Center, CA