Porosity (phi), formation resistivity factor (F), Archie cementation factor (m), and pore geometry factor (a) have strong influences on the processes of electric-current conduction through saturated porous media. In the present study, these parameters were determined from om electric resistivity measurements, along with grain size and water analyses, for a fresh-water aquifer in northern Germany. The aquifer is composed of glacial deposits consisting of silts, sands, and gravels, with a majority of sands and a small amount of clays. The phi and F exhibit, respectively, values ranging from 25% to 51% and from 4 to 16, for which a range of 1.64-2.05 was obtained for m, and a value of 1.25 was obtained for a. An inverse relationship between phi and F, with a coefficient of correlation of 0.95, was also obtained.