Simulating the Evolution of Fluid Underpressures in the Great Plains, by Incorporation of Tectonic Uplift and Tilting, with a Groundwater Flow Model

Figure 28

Modeled head results of running the first model, the 27 Ma model representing the 13-million-year period from 40 to 27 Ma, compared to present-day heads. Model curves , , and (Wolfcampian, Desmoinesian, and Mississippian, resp.) eventually approach the present-day data curves. Red triangles at centroids of the grid columns mark the initial zero heads at 70 Ma.