Ian M. Coulson is an Associate Professor of volcanology and igneous petrology at the University of Regina, Saskatchewan, Canada. He studied at the University of Portsmouth and the University of Birmingham in the UK, before coming to Canada in 1998 to work as a postdoctoral fellow at UBC with Kelly Russell and Greg Dipple, and later Queen’s University. Ian’s interest in volcanism and mineralogy/petrology has led him to work extensively in Italy, Greenland, and across Canada. Ian and his students are involved in collaborative studies of several active volcanoes in the Andes of Colombia, South America and also the Garibaldi Volcanic Complex of British Columbia, Canada. This work is helping to constrain eruption timescales, using a combination of field studies and petrology, diffusion profiles in minerals, analytical petrography and geochemistry to provide insight into periods of magma chamber replenishment and their eruption. Ian is a Fellow of the Geological Society, a member of IAVCEI and is currently an Associate Editor for The Canadian Mineralogist.