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gptkb:Jerusalem_stone
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patinas
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gptkb:Diorite
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Forms clay minerals
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gptkb:Oamaru_limestone
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softens when wet
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gptkb:Rhyolite
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forms clay minerals
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gptkb:CV3_carbonaceous_chondrite
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often shows rusting due to metal content
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gptkb:Jerusalem_limestone
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patinas over time
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gptkb:Gabbro
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Forms clay minerals
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gptkb:Dunites
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Serpentinization
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gptkb:Peridotite
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forms serpentine
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gptkb:R_Horizon
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unweathered
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gptkb:Main_Group_Pallasite
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Variable
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gptkb:Limestones
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susceptible to chemical weathering
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gptkb:Aquia_Creek_sandstone
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prone to weathering
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