Fig. 5

Lithofacies of conglomerates, breccias and chaotically deformed sulfates. A Mosaic packbreccia of anhydrite, which still clearly shows the former bedding. The strata dip to the left, presumably due to gully wall collapse (cf. Dronkert et al., 1990, Plate 2 H). Böttstein, 231.47–231.68 m, «Obere Brekzien», plan view of cut core. B Mosaic floatbreccia of anhydrite clasts in clay, still showing the former bedding, now broken up and folded due to the sinking of the layers into plastic clay matrix. Böttstein, 226.87–226.98 m, «Obere Brekzien», plan view of cut core. C Monomictic float- to packbreccia, mainly developed as rubble breccia, with anhydrite clasts. Most clasts show slight rounding and variable sphericity and are interpreted to have resulted from shrinkage and swelling processes due to drying and wetting. Böttstein, 236.00–236.10 m, «Obere Brekzien», plan view of cut core. D Conglomerate of more or less rounded anhydrite clasts, mainly flat pebbles towards top. The nodules in the center of the picture may be either resedimented or grown in situ during a later desiccation. Towards the top, LF 11 passes into LF 10 (floatbreccia). Marthalen-1, 988.16–988.45 m, «Untere Sulfatzone», 360° core scan. E Conglomerate (base) or breccia (top, flat pebbles) layer of dolomite clasts partly with chert nodules intercalated in dolomitic microbial mat sediments; interpreted as sheet flood or storm deposit. Stadel-3, 1100.72–1101.00 m, «Dolomitzone», 360° core scan. F Rubble floatbreccia composed of anhydrite clasts in clay matrix. The clasts show nodular appearance and partly signs of dissolution (red arrows) and ductile deformation (blue arrows), respectively. Böttstein, 244.43–244.64 m, «Untere Brekzien», plan view of cut core. G Ductile-deformed anhydrite of LF 14 overlying floatbreccia (LF 13). In contrast to ductile-deformed anhydrites of LF 7, the primary layering is only weakly visible and some components indicate vertically directed deformation. Bülach-1-1B, 1262.60–1262.89 m, «Untere Sulfatzone», 360° core scan. H Ductile-deformed anhydrite with primary layering still visible but with evidence of distinct vertically directed deformation in the center of the image. The ductile-deformed anhydrite overlies brecciated anhydrite (LF 9). Böttstein, 248.94–249.04 m, «Untere Brekzien», plan view of cut core. I Ductile-deformed and almost completely tangled anhydrite. On the cut surface mm-sized halite crystals grow (red arrows), which seem to be partly layer-bound (blue arrows). The color change between gray and white anhydrite may reflect an original layering. Böttstein, 255.38–255.60 m, top of «Untere Sulfatzone», plan view of cut core