Students in front of Teton Mountains.
Participants discuss geodetic constraints.
Student describes geothermal activity with help from field trip.
Student and trip leader with map.
West Thumb Geyser Basin.
Checking out spherulites and other textures of the Lava Creek Tuff.
Caldera rim of the North Menan Butte.
Scarp of the Madison Slide.
Columnar joints.
Students describing microbial ecology of the Yellowstone Hot Springs.