A new tectonic map of the Arctic is presented, in which the age and basic structural features of the littoral and oceanic sedimentary basins are shown. A description of the structure of the foundation of the littoral and oceanic sedimentary basins and islands of the Arctic is given. On the basis of a synthesis of all available data and the analysis of new Russian seismic studies, a description of the main sedimentary basins of the Barents, Kara, Laptev, East Siberian, and Chukchi seas is given. It shows that the majority of these sedimentary basins are rift and post-rift basins. For the first time, seismic studies of the oceanic zone are presented, created in the course of the Russian Arctic-2011 and Arctic-2012 projects. Based on the interpretation of these studies, characteristics are presented for the Lomonosov Ridge, the Alpha-Mendeleev Ridge, the Chukchi Cap, the Podvodnikov Basin, the Nautilus Basin, the Eurasian Basin, and other structural regions. Data are presented on the structure of the sedimentary basins of the continental slope. A model of the stratigraphy and geological structure of the entire Arctic region is introduced. The timeline of the geological history of the Arctic in the Mesozoic and Cenozoic eras is discussed.
