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A micrornorphological approach, based upon sets of closely-spaced thin sections taken from three sites located along a climatic and depositional gradient, has been utilised to reconstruct the sequence of pedogenic and sedimentary events leading to the development of the S1 paleosol in northwest China. Two main pedosedimentary stages related to regional changes in monsoonal controls are evident at...
The record of paleoenvironmental change retained within thin sections from loess-paleosol sequences is discussed with reference to case studies from western Europe, China and northwestern USA. The paleoenvironmental significance of individual micromorphological features such as calcitic concentrations, clay coatings and cryogenic structures are first evaluated, and the value of recognising and interpreting...
Hematite is an important iron oxide mineral in loess–paleosol sequences in northwest China. Samples containing hematite and related minerals in the loess and paleosol units from Chinese Loess Plateau were investigated using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and high resolution transmission microscopy (HRTEM). The results show that there are at least three genetic...
Carbonate nodules at the base of paleosols within Chinese loess are products of pedogenic neoformation and thus have great potential to document the summer monsoon history. Here we present mineralogical and elemental compositions of carbonate nodules from a north–south loess transect of northern China for the last and penultimate interglacials. X-ray diffraction patterns show that the nodules are...
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