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FIG. 6. Comparison of (a) orthonormal picture of Section A, and (b) corresponding GPR profile. Boundaries of depositional units (a and b) and main glaciofluvial lithofacies (a) are outlined. The four lithofacies characterized on the field site are sand and gravel mixtures Gcm and Gcm,b, matrix-free gravels Gcx,o or Gcg,o, and medium sands S-x. Boundaries of depositional units from sedimentological analysis and GPR surfaces correlate well. The eight white points on each figure are the correlation points used to normalize electromagnetic wave velocity, which ranged from 0.094 to 0.111 m ns–1 (a mean value of 0.1 m ns–1 was chosen).
