Fig. 8. Photomicrographs of carbonate rings. (a) Fragments of the carbonate rings (CR) dispersed in both the gypsic and the carbonatic-silicatic groundmass of the 2Cry horizon of Pedon B3 (115–200 cm) under crossed polarizers (length of bar: 200 µm). (b) Stained thin section under plane-polarized light of the 4Cry1 horizon of pedon B9 at 160-190 cm, showing carbonate rings (CR) dispersed in gypsic (G) groundmass (length of bar: 200 µm).