Nick Hayman is a geologist who has worked in both submarine and on-land settings. Interested in the faulting process, Nick uses structural geology and other techniques to understand the slip history of faults. A central interest is the role of hydrothermal fluids in creating the textures and mineralogy observed in rocks sampled from fault zones. By combining data from the rock record with geologic maps, submersible observations, and rock mechanics theory, the study of faults and fault rocks is expected to address current problems about the oceanic lithosphere, seafloor spreading, and hydrothermal fluid flow.