Fig. 2: Borehole U1353 data.

Depth profiles of a sediment grain size, b seismic reflection data (from TAN1703 survey) and interpreted facies, c pore water salinity, d porosity, e methane concentration, f plots of HCO3 vs. Cl and g Na vs. Cl. Pore water salinity profiles, derived from the hydrological model (solid line) and the model for solute transport by vertical diffusion (dashed line) for the site of boreholes U1353 and U1354, are included in c.