Assessing Alternative Scenarios for the Cause of Underpressures in the Ordovician Sediments along the Eastern Flank of the Michigan Basin

Figure 10

Simulation of helium unit tracer over 260 Ma using calibrated vertical hydraulic conductivities for glaciation scenario nn9921 for calibrations using present day environmental heads as the initial condition. Coloured lines represent different percentages of ice-sheet thickness applied as excess head to the top boundary condition.