Geological Relics Characteristics and Preliminary Idea for Constructing World Geo-park in Yan'an

Yan'an area is located in the middle reaches of the Yellow River and the central region of the Loess Plateau, where developed various types of geological relics. On the basis of field investigations and comprehensive analysis, the authors classify the geological heritage resources in Yan'an area (e.g., loess strata profile, loess landscapes, river bends of the Yellow River, the Great Waterfall of the Yellow River, the Loess Danxia and the first well of onshore petroleum, etc) into 3 major groups, 7 types and 12 sub-types. These geological heritage resources are distributed in relatively intensive area, and they have great scientific research value and unique landscape aesthetic characteristics in Loess Plateau, even all over the world. Yan'an is also the cradle of Chinese civilization, with brilliant culture and magnificent folk customs. The wonderful geo-heritages of Yan'an have coexisted harmoniously with human resources and ecosystems. Based on the urgent need for the protection, development and utilization of geoheritage resources in Yan'an, it is of great significance to declare and construct Yan'an World Geopark. It is also noted that to constructing Yan'an World Geopark already has the necessary conditions, mature opportunities, far-reaching impact and remarkable effects. Finally, the application of Yan'an for a World Geopark should be started as soon as possible.