Using Grain Size Analysis as the Basis for a Research Project in an Undergraduate Sedimentology Course

Abstract

Multi-week, research style projects within the context of a one-semester undergraduate course provide scope to explore topics in depth and build student skills. I developed a research-style project for an undergraduate sedimentology course using grain size analysis of sediments that combines developing field and laboratory skills, improving writing ability, exploring statistical techniques and encouraging critical thinking. The project asks students to consider the hypothesis that the grain size distribution of sediment samples can be successfully used as fingerprints to identify sediment transport processes and depositional environments. To do this groups of students work together collecting sediment from beach environments, analyzing the grain size distribution of these samples and use statistical analyses such as histograms and log-probability graphs to help interpret their data. The use of log-probability graphs, which are a somewhat controversial technique in sediment grain size analysis, is chosen to introduce students to contentious issues in scientific research and to encourage critical thinking. Success of the project is dependent on providing students with sufficient time and feedback and to re-write reports, analyze data and contribute to classroom presentations and discussions. Development of such projects requires thoughtful selection of a topic that will meet desired pedagogical objectives and careful structure so that time is managed effectively.