A geophysical survey was designed in order to detect ground liquefaction phenomena in a wrecked Early Christian Basilica in the archaeological site of the ancient harbour of Lechaion, located in the southeastern coast of the Corinth Gulf, Greece. EM, GPR and ERT measurements led to the detection of stratigraphy and resistive zones of coarse material which were possibly used in ancient times for geotechnical purposes and could be related with the liquefaction phenomenon characteristics. ERT sections have detected the liquefaction zones successfully suggesting that the method can be a useful tool for such applications. EM and GPR methods add valuable information regarding lateral and vertical changes in sedimentation.


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