In 1936, Huang Jiqing published the Problems of Colouring and Symbols of Geological Maps of China and Nan Yanzong published Discussion on the Usage of Igneous Rock Patterns on Geological Maps. In 1937, Wang Bingzhang’s published Discussion on Symbols Colouring and Patterns of Geological Maps. These made the first step toward “unification” and “standardization” in geological mapping in China.

At this stage, regional geological mapping began to have standard norms, with 1945 and 1948 Huang Jiqing et al.’s 1:3 million Geological Maps of China and a series of Geological Maps of China (1:1 million) as representatives. Through the compilation of these maps, breakthrough of zero geological map in mainland China has been achieved.

A series of geological maps during this period systematically summarized and reflected the achievements of geological survey and geological research in China in the first half of the twentieth century, provided important basic geological data for the planning and deployment of geological work in the First Five-Year Plan of the state, and laid a solid foundation for the future comprehensive geological mapping. In addition to the gradual standardization of geological maps, there are many vivid, interesting, and exquisite hand-drawn drawings that show the beauty of nature from the perspective of geologists.

This is a pencil drawing by early geologists of rock mineral specimens examined under a microscope. The detail demonstrates the professionalism and rigor of the scientists (Fig. 3.1).

Fig. 3.1
figure 1

Microscopic diagram of pyrite from Mt. Liuhuan, Yingde, Guangdong Province [1]

The map clearly and concisely depicts geologic columnar profiles of Jurassic strata in Wenquanxia, Caijiagou, and elsewhere (Fig. 3.2).

Fig. 3.2
figure 2

Geologic column section of Jurassic stratum [2]

In these multi-color regional geological maps, strata and rocks are distinguished using different colors and patterns, mostly in yellow and green. Place names are labeled, and both Chinese and English names are provided for the most important locations. The requirements of a standard geological map are generally satisfied: the map has detailed legend, frame, latitude and longitude lines, and latitudinal and longitudinal coordinates; only compass rose is missing (Fig. 3.3).

Fig. 3.3
figure 3

Geological map of Gulan and Gongxian counties, southern Sichuan [3]

Fig. 3.4
figure 4

Structure map of Mugui manganese mine [4]

The sketch adopts a diagonal composition and depicts the geology with lines of various thicknesses and colors. The yellowed paper is rich in old-fashioned charm (Fig. 3.5).

Fig. 3.5
figure 5

Geological sketch of alluvial gold mine in Taining area, Xikang District [5]

These generously illustrated diagrams vividly depict the tools and engineering operations of fieldwork during the early period of geological exploration (Figs. 3.8, 3.9, 3.10).

Fig. 3.6
figure 6

Geological map of the phosphate mining area in village Zhongyi, Kunyang, Yunnan Province [6]

Fig. 3.7
figure 7

Illustrations attached to special report on copper mines in Zhushan, Hubei Province [7]

Fig. 3.8
figure 8

Diagrams of tool and operations (1) [8]. Source: Diagram of tool and operations (set of three-piece)

Fig. 3.9
figure 9

Diagrams of tool and operations (2) [9]. Source: Diagram of tool and operations (set of three-piece)

Fig. 3.10
figure 10

Diagrams of tool and operations (3) [10]. Source: Diagram of tool and operations (set of three-piece)

Blueprint of geological map with distinct lines and complete and orderly legends and patterns (Fig. 3.11).

Fig. 3.11
figure 11

Geological map of coalfield in Mt. Jiakua, Xiuwen County, Guizhou Province [11]

Fig. 3.12
figure 12

Geological map of Huize [12]

Using ink and watercolors, the map depicts the strata and rock formations of the Huize section prospecting projects along the Xufu-Kunming Railway, with geographic grid and scale (Fig. 3.12).

Fig. 3.13
figure 13

Geological profile of Liujiachong coalfield in Lingling [13]

Fig. 3.14
figure 14

Sketches of the operating mineshafts in Mt. Etou (set of three piece) [14]

Consists of three sketches drawn using single lines, with distinct layers and clear labels (Fig. 3.14).

Fig. 3.15
figure 15

Geological map of coalfields in the vicinity of Duyun, Guizhou Province [15]

A depiction of macroscopic geological bodies and an objective description of local geomorphology that superbly integrates geology and aesthetics (Fig. 3.16).

Fig. 3.16
figure 16

Syncline sketch of Mt. Liaogao [16]

Ancient paper with distinct lines and colored by crayon (Fig. 3.17).

Fig. 3.17
figure 17

Geological map of Jurassic coalfield in Puxin and Jiayu counties, Hubei Province [17]

The profile consists of three small sections, with detailed, well-rendered geological features at a glance (Fig. 3.18).

Fig. 3.18
figure 18

Profile of coalfield in Baoan Township, Daye, Hubei Province [18]

The geological map is rich in content and cleanly drawn in single lines (Fig. 3.19).

Fig. 3.19
figure 19

Geological map of coalfields in the vicinity of Shihuiyao, Daye, Hubei Province [19]

Fig. 3.20
figure 20

China geological map (Guilin sheet) [20]

From 1945 to 1948, under the leadership of Jiqing Huang, the director of the Regional Geological Research Office of the China Geological Survey, 14 sheets of geological map with standard sheet divisions on the scale of 1:1,000,000 were compiled. The map compilation systematically summarizes and depicts the achievements of the national geological survey in 1948 and represents the first national geological map of mainland China. The depicted sheet is bilingual (Chinese and English) with bright colors and was published based on a print from a fair drawing (Fig. 3.21).

Fig. 3.21
figure 21

China geological map (Beijing sheet) [21]

A depiction of macroscopic geological bodies and an objective description of local geomorphology are integrated by the sketch artist. With its small number of strokes, the geological map has the appeal of a landscape painting (Fig. 3.22).

Fig. 3.22
figure 22

Cliff formed from a fault after loessification in Huaiyugou [22]

Fig. 3.23
figure 23

Illustrations attached to geological survey report of deposits in the vicinities of Xuanhua, Zhuolu, and Yuxian [23]

The combination of clear, smooth single lines and coloring makes the map appealing and orderly. The map is in double-line frame, with latitudinal and longitudinal coordinates (Fig. 3.24).

Fig. 3.24
figure 24

Geological map of Mt. Leishan, Echeng [24]

These diagrams are drawn in crayon, mainly red and green. The clean lines objectively portray the local geomorphology while giving consideration to the art of sketching. The viewers feel as if they are in the midst of mountains rising on both sides (Fig. 3.25).

Fig. 3.25
figure 25

Multiple diagrams of even faults at Mt. Guanyin [25]

Fig. 3.26
figure 26

Geological profile of the vicinity of Mt. Tieshan, Daye, Hubei Province [26]

Fig. 3.27
figure 27

The fourth layer sketch maps attached to report of geological exploration at Taolin, Hunan Province (sheet 1) [27]

Fig. 3.28
figure 28

The fourth layer sketch maps attached to report of geological exploration at Taolin, Hunan Province (sheet 2) [28]

Fig. 3.29
figure 29

Geological maps (profiles) of igneous rock and geological formations in the Zhaitang coalfield (Part II) [29]

Fig. 3.30
figure 30

Geological maps (profiles) of igneous rock and geological formations in the Zhaitang coalfield (Part IV) [30]

Fig. 3.31
figure 31

Block-diagram of Panjiachong lead-zinc mine veins (sheeted zone) in Liling, Hunan Province [31]