Ancient Description of Layers in Mountains

Where there is cinnabar above, yellow gold will be found below. Where there is lodestone above, copper and gold be found below. Where there is calamine above, lead, tin, and red copper will be found below. Where there is haematite above, iron will be found below. Thus it can be seen that mountains are full of riches.

Guang Zhong, Collections of Rectifications of the Book of Guang Zi (1956)

• geology