1、Stratum

The geopark area is basically covered by sedimentary rocks with the sedimentary thickness of 2250-2550m, which is divided into 16 official stratum units (Table1-1).
 
表1-1 织金地区地层划分简表

说明：按中国区域年代地层（地质年代）表（2001），栖霞组、茅口组分属中二叠统和上二叠统，但为了研究方便，仍沿用旧的地层代码，以下相同。
Table 1-1 List of Stratigraphic Division in Zhijin Area

Note: according to the geochronologic unit (geologic age) table (2001) of China, Qixia Formation and Maokou Formation belong to Middle Permian series and upper Permian series respectively; however, for the convenience of research, the old stratum code is to be used, and the following are the same.

In the exposed stratum of geopark, Yelang Formation and Yongningzhen Formation of Lower Triassic series dominate, with the total thickness of greater than 300m, and they distribute in the shape of strip piece. They are horizontally separated by coal measure strata of upper Permian series and shale stratum of Triassic System,and are vertically separated by soluble stratum (Huangchunba Member) and unsoluble stratum (Shabaowan Member and Jiujitan Member) of Lower Triassic series, to form distinctive aquiclude structure with coexistence of  both horizontal
and vertical aquiclude. 

Figure 2-1 Areal Geology Diagram of Guizhou Zhijindong Cave Geopark (according to Fu Zichong, et al. 1989)