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Geological Society of America) In recognition of the 25th anniversary of the Circum-Arctic Structural Events (CASE) program, a multidisciplinary, international polar research effort organized and led by the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) of Germany, this volume presents results from 18 major field expeditions involving more than 100 geoscientists. The book focuses on the Proterozoic to Cenozoic tectonic evolution of the circum-Arctic region with correlations to adjacent orogens.