I study the diversification, evolution and impact of the evolution of large land plants in the Devonian Period, 420-360 million years ago. I am interested in rare "fossil forests" which tell us about ancient terrestrial ecology.
My knowledge is informed by an extensive fieldwork programme taking in Greenland, Svalbard, Venezuela, Colombia, Argentina and China, and first-hand knowledge of the major collections of Devonian plants in museums around the world. I very much enjoy working with my colleagues in the Catskill Mountains of New York, USA.