Nat Rutter's research centers on paleoclimates and climate change during the Quaternary period. Special emphasis has been placed on loess-paleosol sequences in North Central China, Siberia and the Russian Plain. A major effort by his students has been on the Quaternary stratigraphy and environments of western and northern Canada. Other research includes the Quaternary stratigraphy of the Colombian Andes and ... Read morethe glacial geology of the Canadian Rocky Mountains. Andrea Coronato is Professor of Physical Geography at the Universidad Nacional de la Patagonia San Juan Bosco in Ushaia, Tierra del Fuego, Argentina, and researcher of the Laboratorio de Cuaternario, Centro Austral de Investigaciones Científicas (CADIC), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET) at Ushaia, with emphasis on the physical geography, geomorphology, and paleoenvironments of Southern Patagonia and Tierra del Fuego. In the last years she has worked on the study of glacial, fluvial, and Aeolian geomorphology, Quaternary glaciations and the environmental impact of Canadian beavers on fluvial systems of Tierra del Fuego. Jorge Rabassa is Professor of Geography at the Universidad Nacional de la Patagonia San Juan Bosco, Ushaia, Tierra del Fuego, Argentina, and researcher of the Laboratoria de Cuaternario, Centro Austral de Investigaciones Científicas (CADIC), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET) at Ushaia, working on late Cenozoic geology, geomorphology, and paleoenvironments. During the past years he has studied glacial geology and geomorphology of Southern Patagonia and Tierra del Fuego, Late Cenozoic glaciations, and the impact of global climate change on Patagonia glaciers. Jorge Rabassa is the editor of the book “The Late Cenozoic of Patagonia and Tierra del Fuego, Vol. 11: Developments in Quaternary Science” (2008). Karin F. Helmens works for the Department of Physical Geography and QuaternaryGeology of Stockholm University and is, among others, author of the book “Neogene-Quaternary geology of the high plain of Bogotá, Eastern Cordillera, Colombia: stratigraphy, paleoenviroments, and landscape evolution” (1990). Marcelo Arístides Zárate work at the Instituo de Ciencias de la Tierra y Ambientales de La Pampa in Argentina. He is currently Investigador of CONICET and works for the FCEN-Universidad Nacional de La Pampa as Adjunct Professor. He has about 85 publications to his name. Show Less