We are splitting hairs a bit. either one would fit.
ge·og·ra·phy /jēˈäɡrəfē/ noun noun: geography
the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industries. the nature and relative arrangement of places and physical features. plural noun: geographies
ge·ol·o·gy /jēˈäləjē/ noun noun: geology
the science that deals with the earth's physical structure and substance, its history, and the processes that act on it. the geological features of an area.