I enjoy the historical aspects of geology, looking back in time to explore past events and ancient life. My research and that of my students is focused in two main areas. We use the techniques of sedimentary geology and geochemistry to explore the Earth's earliest surface environments, life, and crustal development, generally before 2.5 billion years ago. Much of this research is focused in South Africa and Western Australia. The other half of my research deals with deep-water sedimentation, especially using outcrops and cores to study the processes by which coarse sediment is transported and deposited in the deep sea.