Abstract:As a climatic proxy, eolian sandstones have been applying in the paleoclimatic analysis. For the Late Cretaceous eolian sandstones in South China, lithofacies and paleoclimatic indications have been deficient, while paleowind system has been dispute in the paleowind directions. In this study, we conducted integrating analyses of lithofacies, texture, and paleowind directions for the eolianites from the Honghuatao Formation of the Changsha Basin, Li-You Basin, and Cha-Zi Basin, middle-southern Hunan. Results show that sandstones are orange-red and brick-red with large and high-angle cross-beddings, in which laminal set is often 3?10 m thick, even up to ~20 m; detrital grains are dominated by fine sand with medium-good roundness and sorting; reddish brown and / or dark brown Fe-varnish are common along the quartz edge; impact scars of dish-, V-, and crescent- shape generally occur on quartz surface; sandstones are characterized by grain-supported and Fe-mud matrix textures; and main surfaces of reactivation surfaces (R), interdune migration surfaces (I), and superimposition surfaces (S) bound the dunes. They together indicate the sandstones of the Honghuatao Formation are eolian in origin. These eolianites had been built onto the underlain Luojingtan alluvial fan conglomerates and both laterally interfinger out each other. The alluvial fan lithofacies is featured by pulse debris and muddy gravity current sediments, manifesting arid alluvial type. Eolian sandstone and associated arid alluvial fan lithofacies suggest the (semi-) arid climate, possibly in a relative cooling condition. Low distribution in basin and association with proximal-source alluvial fan facies indicate the Late Cretaceous eolian sandstones have been accumulated in an intermontane dune environment rather than in a sand-sea desert. Two sets of paleowind directions SE and NE are predominantly recognized from the eolian sandstones, which are not compatible with those of modern planetary wind system. It is proposed that they two sets of prevailing wind directions might be a superposition imprints of modern planetary, East Asia monsoon, and local reflection-refraction wind systems.