Presentations will lie within the field of planetary geology and reference to the Earth will constitute a substantial part of most talks. Most earthly features will be from western America. Ideally, I will have some first-hand experience with cited examples. Some examples may be from the literature or satellite imagery.

            Presentations to university audiences or to groups with specific interests will be more detailed, provocative and directed toward those interests. Talks to a general audience might include a tour of the solar system, an assessment of dangers associated with asteroid or comet impacts, the extinction of Dinosaurs by asteroid impact or the origin and variety of meteorites and other space objects. In what might your group be interested? Look over the lists of past presentations. Do any fit your needs? I can cover a vast array of topics not indicated on those lists, but it might take additional preparation. Do you have a selected topic? Tell me about your topic and the audience. If I feel comfortable, I'll do it. If not, I'll tell you.