An area along a rift where plates remain attached to each other. In such a zone, no new crust develops, so that the locked zone stretches, and the crust thins. Ultimately, the plates will separate. See Wallace et al. (2004) J. Geophys. Res. 109, B12 and Hyndman et al. (1995) J. Geophys. Res. 110, B8.
Subjects: Earth Sciences and Geography.