Figure 6

Figure 6.

Model for metamorphic core complex (MCC) dichotomy in the North American Cordillera explained by buoyant upwelling in variably thick crust, including predictions for temporal trends, phases of thermal incubation, and connections with regional extension. H_mh and H_mf—thickness of the low density, lower crust layer in the hinterland and foreland, respectively; λ_h and λ_f—diapir spacing in the hinterland and foreland, respectively.