This study is based on about 8400 km of multi-channel seismic (MCS), magnetic and gravity data as well as 20 sonobuoys collected by the Russian Antarctic Expedition in the Davis Sea and adjacent areas between 80°E and 102°E. The major tectonic provinces and features are identified and mapped in the study region including: 1) A marginal rift with a an extended continental crust ranging between 130 and more than 200 km in width; 2) The volcanic plateau named the Bruce Bank with early Cretaceous igneous rocks; 3) early Cretaceous and late Cretaceous-Paleogene oceanic basins; and 4) The early Cretaceous igneous province of the Kerguelen Plateau. Four major unconformities identified in the sedimentary cover of the Davis Sea region are interpreted to correspond with fundamental tectonic events and/or paleoenvironmental changes.