Jan Zalasiewicz is a field geologist, stratigrapher, and palaeontologist formerly with the British Geological Survey and now at the University of Leicester, United Kingdom. His research covers geological processes and environmental change from the Precambrian to the present day, with particular interests in the early Palaeozoic and the late Cenozoic, and in present-day and future geological change. He currently chairs the Anthropocene Working Group of the International Commission on Stratigraphy.