The bottom of the Lincoln Sea was formed in a continental area stretching Greenland-Barents Sea shelf. Prior to stretching the continental plateau of the shallow Morris Jesup and Ermak rep-resented the single unit. In the course of a single continental rifting is split in the plateau, giving rise to a process propagating mid-oceanic Gakkel Ridge. The process continued split-huddled around 1.5 my. in the range of 35.3–33.7 my. The introduction of numerous basic dikes in the process of rifting could determine high amplitude magnetic anomalies on a single plateau. For the first time carried out the restoration of the geometry of the crack split the continental crust, the Euler pole and angle describing its kinematics and restored paleobathymetry on the flanks of the cracks.

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Variability of oxygen and hydrogen sulphide concentrations in the Gdansk basins deep water of the Baltic Sea for the last 25 years was analyzed. It was shown that suboxic and anoxic conditions in deep water were mainly determined by Baltic inflow frequency and intensity. Oxygen concentration in the bottom layer of the Gdansk basins increased strongly in 13 months after Major Baltic Inflow events (MBI). There were three periods of strong increasing of dissolve oxygen concentration in deep water since 1992 till 2018 after MBI in 1993, in 2003 and 20142016. It was shown that at the bottom of the Gdansk basins hydrogen sulphide was detected during 79 months till 22.5 years after MBI. Quality evaluation of dissolved oxygen distribution reanalysis was also conducted in this work. It can be noted good reproduction of field data by the reanalysis in its quality part; however, in most cases the observable maximum concentrations in dissolved oxygen distribution are understated, sometimes even several times.