Choose a "classic" paper in geomorphology that relates to your research, or one that you've always been meaning to read. Enlist your advisor's help to make sure that it's a good one. If the article is short, provide a paper copy or pdf a week in advance for the group to read. If it is long (10+ pages), select an important excerpt and be prepared to give a summary of the main points of the article.
email Sarah to get on our weekly reminder list or sign up to present... if you are also interested in giving a talk on your own research let me know.