The upper 15 meters of gyttja and other detritus mud was deposited in the Warsaw area during the eemian interglacial (Eem, Mikuliński, Ipswichian, R/W). The length of the postglacial channel lake was over 12 kilometers and its width varied between 250 and 750 meters. The area where organic and calcareous sediments can be found is significant; therefore, their presence in construction grounds in the area of Warsaw repeatedly forced additional site and laboratory investigations of the geological and engineering conditions of soil. The interglacial lake sediments have been studied for more than 100 years; however, there are no known attempts of using electrical methods in the analysis of these sediments. The paper presents an assessment of their usefulness for determining the depth of occurrence of gyttja and lacustrine chalk as well as their value in estimating sediment thickness on the basis of field and laboratory research.

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2011 - Vol.53
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