academician of the USSR Academy of Sciences (1925; academician of the St. Petersburg Academy of Sciences since 1896, academician of the Russian Academy of Sciences since 1917), first elected president of the Russian Academy of Sciences (1917-25), President of the USSR Academy of Sciences (since 1925). One of the organizers and director of the Geological Committee (1885-1903). The main works on stratigraphy and paleontology, tectonics and paleogeography, petrography, the genesis of ore deposits, etc
Сonclusion