Comparative Study on the Regional Characteristics of Danxia Landform in Southeast and Northwest China——A Case Study of Danxia Landform in Fujian Province and Gansu Province

[Objective] The study aims at exploring the regional characteristics and causes of Danxia landform in southeast China and northwest China.[Method] With Wuyi Mountain and Yong'an in Fujian Province and Benkang and Zhangye in Gansu Province as study area,through field survey,the Danxia landforms of southeast China and northwest China are compared in their morphological characteristics,structure,development process,and forming condition.Then the internal and external factors and the time factor leading to the regional difference are discussed.[Result] The Danxia landforms in China vary from place to place.The Danxia landform in Fujian is marked with flat top,steep slope and slow foothill,developing into the landscape of Danxia landform in subtropical humid area,such as the waterside red cliff and the strip of sky.Gansu is marked with round top,protuberant eaves,steep slope and slow foothill,developing into the landscape of Danxia landform in temperate arid and semi-arid areas.[Conclusion] The regional difference of Danxia landform in China is the comprehensive result of staggered tectonic movement,zonal external force of physiognomy and periodic development process.