Polish explorer and geologist (1833–1876)
Aleksander Piotr Czekanowski, or Aleksandr Lavrentyevich Chekanovsky was a Polish geologist and explorer of Siberia during his exile after participating in the January Uprising. He took part in and later led several expeditions, surveying and mapping the geology of Eastern Siberia. He was released from exile in 1875, and in 1876 took up the post of custodian in the Mineralogical Museum of the Academy of Sciences.
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