Figure 11. Cross section view of hydraulic head from DSTs showing hydrodynamic features of the basin (see Figure 1 for location). Elevated overpressure is common in the west and north where mobile-shale diapirism creates fracture systems on top of shale-cored anticlines. In the center of the Mackenzie Delta, where listric faulting prevails, overpressure usually does not occur above 2500m. Hydrostatic pressure regime is typical in the pre-Tertiary succession of the south basin margin.