© Mixa, Petr | 2008
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© Seifert, Antonín | 2008
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© Budinský, Vladimír | 2008
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© Budinský, Vladimír | 2008
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© Budinský, Vladimír | 2008
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© Seifert, Antonín | 2009
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© Seifert, Antonín | 2009
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Siltstone dune, Mongolian Altai
© Hanl, Pavel | 2012
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Red Jurassic sediments, Mongolian Altai.
© Hanl, Pavel | 2012
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Permian rhyolite, Mongolian Altai
© Hanl, Pavel | 2012
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