... present day because erosion has reduced the elevation of the basin's western margin. Paleohydrologic models calculated for the basin (Lee and Bethke, 1994) suggest that in the Eocene groundwater flowed eastward through the Lyons at an estimated discharge... Geochemical and Biogeochemical Reaction Modeling - Page 379by Craig M. Bethke - 2007Limited preview
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Craig M. Bethke - Science - 1996 - 416 pages
...flowed eastward through the Lyons at an estimated discharge of about 1 m/yr. Flow in the Pennsylvania!! Fountain formation, a sandstone aquifer that underlies...flowed eastward at an estimated discharge of about 0. 1 m/yr. Where Fountain groundwater encountered less permeable sediments along the basin axis, it...