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New insights into the hydrostratigraphy of the High Plains aquifer from three-dimensional visualizations based on well records

¹ Kansas Geological Survey, Lawrence, Kansas 66047, USA

View larger version (33K): [in this window] [in a new window]   Figure 1. Distribution of borings for which drillers' logs are available in the pilot study area and the location of the Haskell County boring (shown as a red circle).

View larger version (18K): [in this window] [in a new window]   Figure 2. Relative permeability profile and major Neogene lithic units encountered in the Haskell County boring.

View larger version (41K): [in this window] [in a new window]   Figure 3. Elevation of the bedrock surface beneath the Neogene sequence. The white dashed line is the subcrop of the northward-dipping Mesozoic–Permian bedrock boundary beneath the Neogene in the study area.

View larger version (41K): [in this window] [in a new window]   Figure 4. Neogene sediment thickness in the pilot study area and the location of the Haskell County boring.

View larger version (53K): [in this window] [in a new window]   Figure 5. (A) Mean relative permeability and standard deviation as a function of Neogene sediment thickness. (B) Aggregate relative permeability of Neogene sediments showing the location of the Haskell County boring.

View larger version (46K): [in this window] [in a new window]   Figure 6. Fence diagrams derived from the smoothed (A, C) and unsmoothed (B, D) three-dimensional visualizations of the percent relative permeability in Neogene sediments. I—upper sheet sand and gravel; II—incised valley fill (>80% relative permeability); III, IV, and V—silty clay (<45% relative permeability). The index map shows the counties included in the study area; the Arabic numerals identify each fence diagram panel.