Cl⁻ as a Chemical Fingerprint of Solute Transport in the Aquitard-Aquifer System of the North Jiangsu Coastal Plain, China

Figure 3

Geological profiles, time periods of the drilled boreholes in NJCP, along with hydrostratigraphic interpretation. The marine oxygen isotope stages are determined by the marine micropaleontology identification. I, II, and III represent the positions of first, second, and third confined aquifers.