Owing to the rise of tourism geoscience and the requirement of geoscience popularization,the research of redbeds and Danxia landform is attracting more and more attention. The Xiangshan Geopark of Guixi City in northeastern Jiangxi Province is featured by the prominent reddish cliffs. The bedrock of the Danxia landform is the conglomeratic strata of the Late Cretaceous Hekou Formation of the Guifeng Group,which is characterized by erosional bases,graded beddings and cross beddings. The sedimentary structures are useful to interpret depositional environments. A detailed centimeter-scale outcrop section was measured to describe lithofacies. Moreover,two conglomerate outcrops were chosen to perform pebble counting. In the measured 40-meter- thick stratigraphic column of the Hekou Formation,seven lithofacies were distinguished: normal graded conglomerate (facies A),inverse graded conglomerate (facies B),structureless conglomerate (facies C),parallel bedding conglomerate (facies D),cross bedding conglomerate (facies E),concentrated conglomerate (facies F),and sandstone (facies G). Clast sizes are mainly 2 cm to 5 cm,although it can range from 0.5 cm to 12.5 cm. Clasts are poorly rounded and moderately weathered. They are composed dominantly of tuff (58% - 66.5%) with minor quartzite,granite,and sandstone,which is indicative of the dominant sediment derivation from the Early Cretaceous volcanic-intrusive complex outcropped along the southern margin of the basin. Based on the measured section and pebble counting,the alluvial fan depositional system is envisaged for the formation of the redbeds of the study area. The sediment increments were produced by the combination of faulting along the basin margin with episodic strong rainfalls and transported by braided streams on the alluvial fan lobes. As a result,the frequent interstratification of the conglomerate and sandstone beds,erosions,prevalent fining-upward units were preserved in the outcrops. In addition,under an overall arid climate regime during Late Cretaceous in Southeastern China,the stream-dominated alluvial fan systems were indicative of a climate change towards greater humidity which possibly resulted in abundant streams transporting coarse sediments to the basin area.