This course places dual emphasis on stratigraphic principles and practices. Major accent is given to stratigraphic nomenclature, interpretation of sedimentary facies and sequences, evaluation of geologic contacts and the use of stratigraphic indices. These concepts are applied through laboratory work to field descriptions of stratigraphic sections, correlation techniques in practice, production of derivative maps from surficial and subsurface data and the use of stratigraphy as a tool by the economic geologist. Labs employ modern computer graphics and plotting methods whenever possible. Prerequisite: Geology 103 and senior standing.