Branch of geology dealing with surface land features and the processes that create and change them.
- Western Region Geology and Geophysics Center [More info]
- Overview of the research of this organizational unit with links to projects and activities and to geologic information on the western U.S.
- Yosemite Valley geologic story [More info]
- Site describes the present understanding of the various geologic processes that contributed to the valley's creation. Links to Yosemite Valley's geologic maps.