Correlation of lithostratigraphy, median grain size (Md), magnetic susceptibility (SUS), and δ13C of bulk organic matter between the Baoji, Lantian, and Xingyang sections. Note (i) the stratigraphic contrast between soil unit S0 (Holocene) and loess unit L1-1 [Last Glacial Maximum (LGM)] in each section, and (ii) the similarity in the structure of Md, SUS, and δ13C curves.