Research on the Genesis and Development of Danxia Landform in the South Sichuan

Abstract

The South Sichuan is one of the areas in China famous for Danxia Landform. Danxia Landform in the South Sichuan is characterized by wide distribution and square shaped hills. However, there is no systematic research on the genesis of those Danxia Landforms at present. Based on the study of spatial distribution and the genesis of the Danxia Landforms in the South Sichuan, we discovered that the lithostratigraphy, regional tectonic, crustal uplift and external forces contribute together to the formation of the Danxia Landform. On the basis of learning the development experiences from famous scenic spots and the updated national policies and regulations, proposals were made to boost the development of Danxia Landform resources in the South Sichuan by excavating its historic, cultural, natural and scientific connotation in the form of educational tourism.

Local adaptation and subsistence strategy of Yangshao migrants in Northwestern Sichuan in China during the Middle Neolithic (5300–4700 cal. BP)

“…d’Alpoim Guedes et al (2015) argued that millet cultivation, especially broomcorn millet, would be extremely challenging in the Tibetan Plateau based on Growing Degree Days (GDD) modeling. Besides, the estimated Mid-Holocene mean annual precipitation (MAT) in the NW Sichuan highland is 500–800 mm, similar to the present-day MAT of 600–800 mm (Li and Yang, 1989; Zhou et al, 2011, 2021). This level of precipitation would not be ideal for millet cultivation since millet agriculture is nearly absent in most places in NW Sichuan today (Li and Yang, 1989).…”

“…Besides, the estimated Mid-Holocene mean annual precipitation (MAT) in the NW Sichuan highland is 500–800 mm, similar to the present-day MAT of 600–800 mm (Li and Yang, 1989; Zhou et al, 2011, 2021). This level of precipitation would not be ideal for millet cultivation since millet agriculture is nearly absent in most places in NW Sichuan today (Li and Yang, 1989). Thus, crop yields were likely very low.…”

“…thermohydrology) and multiple vegetation types (i.e. dessert-steppe, forest, scrub, and meadow) (Chen et al, 1994; Li and Yang, 1989; Peng et al, 1989). Secondly, although foxtail millet has higher yields, broomcorn millet requires fewer nutrients and has a shorter growth cycle (Hunt et al, 2011).…”