1. Research Associate, Dept. of Geological Sciences and Geological Engineering, Queen’s Univ., 36 Union St., Kingston, Ontario, Canada K7L 3N6 (corresponding author).
2. Associate Professor, Dept. of Geological Sciences and Geological Engineering, Queen’s Univ., 36 Union St., Kingston, Ontario, Canada K7L 3N6.
3. Professor, Dept. of Geodesy and Surveying, Aristotle Univ. of Thessaloniki, University Box 440, 54124 Thessaloniki, Greece.