October 10 is the 155th anniversary of the birth of outstanding geologist, geographer and writer Vladimir Obruchev. He studied the geology of Siberia, came up with a theory explaining the origin of gold deposits and predicted directions for further search of the precious metal. Obruchev highlighted a new section of tectonics. He wrote more than 450 works devoted to the earth sciences. In 1892-1894 he participated in the expedition of G. N. Potanin, was awarded the Constantine medal of the Russian Geographical Society for his work on the geology of Asia and the Przhevalsky award. He is the author of adventure books, including the famous "Sannikov Land". More than two dozen geographical objects were named after Vladimir Obruchev.