Extended Data Fig. 3: Arkona Basin coring sites.
From: Methane leakage through the sulfate–methane transition zone of the Baltic seabed
a) Location map of stations. The island of Rügen is shown for orientation. The brown areas mark organic-rich Holocene mud while the cross-hatched areas mark shallow gas identified by acoustics71. Note that the offset between shallow gas (cross hatch) and mud layers (brown) is likely a spatial resolution error between the techniques. b) Sulfate and methane profiles are shown for the four stations (station labels in bottom right of frames together with the RSWI/SMT values). Methane data are presented with expanded scale of 0-1 mM to demonstrate tailing up through the sulfatic zone. The black dashed lines indicate the SMT depth. Values of RSWI/SMT show how much methane leaks from the SMT to the SWI.
