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Fig. 4. Dingxi Section: field-observed pedostratigraphy and laboratory data. Md (µm): median size; <10 µm (%): percentage of <10-µm fraction; <2 µm (%): percentage of <2-µm fraction; CaCO3 (%): percentage of carbonate; 
: magnetic susceptibility (10–7 m3 kg–1); and fd: frequency-dependent susceptibility (%). Three shaded strips (I, II, III) are paleosol zones (S1S1, S1S2, S1S3). Three arrows within the three shaded strips indicate carbonate leaching and accumulation in the three paleosols.
