1. Department of Structural, Historical and Applied Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2. Department of Hydraulics, Soil Science and Agricultural Engineering, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
3. Department of Geophysics, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece