What is the relation between geology & civil engineering?

geology is studying the bast and properities of the crustal rocks to support the future which depends on civil engineering at least to determine the favourable place for construction,.....etc.

Civil engineering is the branch of engineering that deals with the design, construction and maintenance of roads, bridges, large buildings, airports, ports, subways, dams, mines and other large-scale developments. It is one of the oldest branches of engineering.Many of the world's great monuments are the result of the successful marriage of civil engineering and geology. For a civil engineering project to be successful, the engineers must understand the land upon which the project rests. Geologists study the land to determine whether it is stable enough to support the proposed project. They also study water patterns to determine if a particular site is prone to flooding. Some civil engineers use geologists to examine rocks for important metals, oil, natural gas and ground water.

Civil structures are either founded on earth or constructed inside it. Knowledge of geology in the project area allows us to design structures to withstand the interactions they undergo with the underlying/surrounding ground.

the relation between  the  geology ans the civil engeneering is very vaste : 

1- stdy of matiers of construction

2-stady of tthe strecture of the area  construction