“…Several seismic studies [9][10][11][12][13][14][15] were conducted to map bottom-simulating reflectors (BSRs), which are used as an indicator for the base of the structure I (sI) gas hydrate stability zone (GHSZ). However, BSRs are not widely distributed in the Black Sea [2,8,10,16] and occur in patches (Figure 1, see also e.g., [6,17]). Across the thick sediment deposits of the Viteaz channel-levee system of the Danube deep-sea fan, a stack of up to five BSRs was identified and linked to former climate conditions of the lower seafloor temperature and sea levels during glacial times compared to inter-glacial climate epochs [9,18].…”