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File:Wuppertal - Hahnenfurth - Oetelshofen-Steinbruchtag - Grube Osterholz 01 ies.jpg - Wikimedia Commons
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conveyor system in a limestone quarry, Germany, Bergisches Land, Steinbruch Osterholz, Dornap, Wuppertal Stock Photo - Alamy
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File:Wuppertal - Hahnenfurth - Oetelshofen-Steinbruchtag - Grube Osterholz 12 ies.jpg - Wikimedia Commons
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group of children prospecting for fossils in a quarry, Germany, Bergisches Land, Steinbruch Osterholz, Dornap, Wuppertal Stock Photo - Alamy
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limestone quarry, Germany, Bergisches Land, Steinbruch Osterholz, Dornap, Wuppertal Stock Photo - Alamy
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Schlammteich in einem Steinbruch, Deutschland, Bergisches Land, Steinbruch Osterholz, Dornap, Wuppertal q
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