performed in the Institute of Physics, Silesian University of Technology, Gliwice. The
reliability of our method has been tested by the 210Pb measurements in the sediments of
Lake Gościąż. The reasons for the non-monotonic profile of 210Pb in these sediments have
been discussed. We also report and discuss the 210Pb measurements in the sediments
formed in front of the Skeidarar glacier (Iceland).