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G11 Ohio Bedded Shale

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G12 Arizona Sandstone

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G13 Strongsville Shale

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G14 Kentucky Shale

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G15 Pismo Sandstone

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G16 Colorado Columnar Basalt

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G17 Newport Sandstone

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G18 Corona Granite

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G19 Kauai Lava

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G20 Santa Cruz Limestone

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