Cont d Figure 12-1: Comparison of Conoco/Magma and 2020 FCP TCu check assays Figure 12-2: Comparison of Conoco/Magma and 2020 FCP ASCu check assays
. | April 4, 2023
Williston and Powder River Basins aquifer systems Science Center Objects
The Williston and Powder River Basins study combines the lithostratigraphic units of the glacial, lower Tertiary, and Upper Cretaceous aquifer systems in the United States and Canada into 7 regional hydrogeologic units-glacial deposits, 4 bedrock aquifers, and 2 bedrock confining units-using general hydraulic properties.
WAUSP williston and powder river basins photo 10.
The glacial deposits are composed of till and glacial outwash sands and gravels with areas of cobbles and boulders. The four bedrock aquifers are the upper Fort Union, lower Fort Union, lower Hell Creek, and Fox Hills aquifers and are contained primarily in sandstone layers. The two confining units are the middle Fort Union hydrogeologic unit (shale) and upper Hell Creek hydrogeologic unit (contains less sandstone than the underlying lower Hell Creek aquifer). Water from hydrogeologic units in these three aquifer systems is relative