(A) Geological sketch of the Eastern margin of the Pelagonian zone between the Kajmackchalan and Pierias Mts. Large red arrows: vergence of the ophiolitic sheet during the obduction (D₁ event), large black arrows: top-to-the-E vergence of the ophiolites during the exhumation event (D₂ event). The stereonets give: fold axes (B) and lineations (l) on equal area projection, lower hemisphere; n: number of data, B₁, B₂..: successive fold families at the analyzed sites, pt.1, 2, and 3: locations of the Mavro Raki formation. Sites, A1, 2: Arnissa, A3: Grammatikos, A4, 5: Messovouno, A6: East Pelagonian, A7, 8: Agios Dimitrios. Section I: kilometric scale folds near Ayios Dimitrios (Kozani geol. sheet, Anastopoulos et al., 1980) formed below the ophiolitic sheet, it indicates a top-to-the-WSW vergence (D₁ event) followed by an eastern vergence (D₂ event) (Section II) (after Vergély, 1984) (see text). At the top of the Fig. 5A, cartoons show the top-to-the-W. folding below thrusting of the ophiolitic nappe and top-to the E. folding of the substratum of ophiolite nappe during the exhumation. (B) Geological sketch of the Vourinos area and schematic cross section of the Vourinos ophiolitic sheet. Sites B₁, B₂ are situated 5 km N of Khromion village and B₃, B₄ along the Aliakmon River bank; same symbols as on Figure 5A.