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Tony Markham: Shattered rock
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Tony Markham: Woronora River_1
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Tony Markham: Woronora River_2
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Tony Markham: Woronora River_3
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Tony Markham: Sandstone
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Tony Markham: Boulder
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Tony Markham: Boulder_2
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Tony Markham: Woronora River_4
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Tony Markham: Woronora River_5
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Tony Markham: Liesegang rings
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Tony Markham: Xanthoria elegans