Sedimentological Characteristics and Significance in Cause of Formation of Neogene Red Clay Particle Size

• 1、State Key Laboratory of Continental Dynamics， Department of Geology. Northwest University

Abstract：Based on the analysis on characteristics of the particle size of quaternary loess, which is paleosol, neogene red clay, fossil surrounding rock red clay, aquatic loess, Ba River terraces sediments and Huai River bottom sediments, with typical aeolian cause of formation, we found that it shows great similarity on distribution in parameter integrated graph between neogene red clay and hydatogen sediment, whose distribution area is big including centeralized distributed loess, paleosol and fossil surrounding rock red clay. This indicates that neogene red clay possess not only composite characteristics of aeolian quaternary loess, paleosol sediments, but also them of hydatogen sedimen. Despite some layer sections of neogene red clay including fossil surrounding rock experiecned rheobiotic reconstruction, the source of the mother material particles of the neogene red clay and fossil skeleton surrounding rock, where fossils are buried into, resembles quaternary malan loess, the 5th layer paleosol, both of them are the consequence of eolian transporting, whose particle size composition and frequency-Probability accumulation curve seldom varies, which didn\\\\\\\\\\\\\\\

Keywords： Neogene Red Clay Particle Size Cause of Formation