For senior thesis, completion of EES 4960 is required. The senior thesis will be graded only as satisfactory or unsatisfactory, without being awarded a letter grade. Students may choose the topic of senior thesis research from any branch of earth and environmental sciences; current course offerings in the EES department may be taken as a rough indication of the range available. Broad latitude will be allowed in the study methods adopted: field work, experiments, theoretical studies, and literature study are all considered viable focus areas, either singly or in combination. The candidate's thesis advisor will normally judge the completed thesis, but may call upon other members of the faculty for assistance, either within the department or outside.