Structural geology Structural geology Deformation of each rock depends on its physicalproperties, and metamorphism type is in relation to temperature, pressure and time. Their verification can present principles for deformation, production of structures, like faults, folds and salt domes. To make a scientific study respecting the structures of Earth's crust in a region or even on the whole Earth, familiarity with petrology, sedimentology, stratigraphy, geomorphology, economic geology, photogeology and vast field work is absolutely essential. Based on the mentioned points, geology is the science of the structures of Earth's crust verification, and the causes of their occurrence. Discomformities of mineral veins produced by faults plus oil and gas concentration in anticlines has a straightforward function with resistance and safety of dams, buildings, etc. Deformation of crust produced by stress and its effect on structures, relative dating of lithified layers with regard to thrusting, fracturings and thousands of other cases indicate the relationship between structural geology and daily life of human being. Structural Geology is primarily the study of mountain belts