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Figure 2. Conceptual model of a rotating spreading center along the MRC. (A) Initial rifting geometry. (B-D) Gradual clockwise reorientation of spreading axes. The spreading segments decrease in length as rotation increases, resulting in an arcuate bend of fracture zones and reduced distance between fracture zones. (E) Geometry immediately following cessation of spreading and onset of transcurrent motion. When spreading axes become aligned with the relative plate motion vectors (parallel small circle around pole of rotation), deformation changes from extension to transform motion.