Durbachite boulder
© Otava, Jiří | 2005
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Old red facies sandstones and conglomerates
© Otava, Jiří | 2006
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Josefov brachiopode limestones
© Otava, Jiří | 2011
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Cenomanian conglomerates
© Otava, Jiří | 2011
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Březina shales
© Otava, Jiří | 2011
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Jurassic geodes
© Otava, Jiří | 2012
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Cenomanian sandstones on tonalites
© Otava, Jiří | 2012
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Źluté písky adit
© Otava, Jiří | 2012
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Cenomanian sandstone
© Otava, Jiří | 2012
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Černý důl shaft
© Otava, Jiří | 2012
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© Otava, Jiří | 2013
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