An Abrupt Transition in the Mechanical Response of the Upper Crust to Transpression along the Queen Charlotte Fault

This is the publisher’s final pdf. The published article is copyrighted by the Seismological Society of America and can be found at: http://www.bssaonline.org/.The Queen Charlotte Fault (QCF) is a major strike-slip fault that forms\ud the boundary between the Pacific and North American plates from 51° to 58° N. Near\ud 53.2° N, the angle of oblique convergence predicted by the Mid-Ocean Ridge VELocity\ud (MORVEL) interplate pole of rotation decreases from >15° in the south to