Articles | Volume 10, issue 2
Research article
22 Mar 2019
Research article |  | 22 Mar 2019

Submarine groundwater discharge site in the First Salpausselkä ice-marginal formation, south Finland

Joonas J. Virtasalo, Jan F. Schröder, Samrit Luoma, Juha Majaniemi, Juha Mursu, and Jan Scholten

Data sets

Hydrographic data, surface seawater radon-222 concentration, and loss on ignition and caesium-137 values of sediment samples from the Hanko submarine groundwater discharge site, northern Baltic Sea, Finland J. J. Virtasalo, J. F. Schröder, S. Luoma, J. Majaniemi, J. Mursu, and J. C. Scholten

Short summary
This study establishes the local stratigraphy and 3-D aquifer geometry of a submarine groundwater discharge site in the Hanko Peninsula, south Finland. The study is based on a rich dataset of marine seismic profiles, multibeam and side-scan sonar images of the seafloor, and onshore ground-penetrating radar and refraction seismic profiles. The groundwater discharge takes place through metre-scale pockmarks on the seafloor, confirmed by elevated radon concentrations in the overlying water.