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Geohydrologic systems in Kansas physical framework of the lower aquifer unit in the western interior plains aquifer system

Hydrologic Atlas 722-F

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Abstract

Thickness of the lower aquifer unit in the Western Interior Plains aquifer system is depicted in geohydrologic section B-B" (fig. 6) and on the accompanying thickness map (fig. 7). The thickness of the lower aquifer unit ranges from a few feet near the edges of the Nemaha Anticline, the Cambridge Arch, and the Central Kansas Uplift, where the aquifer unit has been removed by erosion, to about 2,500 feet thick near the southwest corner of the State in Morton County (fig. 7). The areas of greatest thickness in central and eastern Kansas along the Kansas-Nebraska State line do not coincide with the deepest parts of the Salina and Forest City Basins in Kansas, but do relect the effect of the North Kansas Basin (fig. 5), which is a pre-Mississippian structural feature that existed during deposition of part of the lower aquifer unit (Merriam, 1963). The Ellis Arch, which is another pre-Mississippian structural feature (fig. 5), also was present during deposition of part of the lower aquifer unit (Merriam, 1963). Evidence of this arch generally has been masked throughout much of the area of the arch by later development of the Cambridge Arch and Central Kansas Uplift. However, the broad area where the lower aquifer unit is rather thin west of the Cambridge Arch in northwestern Kansas may be a remnant of the Ellis Arch (compare figs. 5 and 7).

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geohydrologic systems in Kansas physical framework of the lower aquifer unit in the western interior plains aquifer system
Series title:
Hydrologic Atlas
Series number:
722
Chapter:
F
Edition:
-
Year Published:
1994
Language:
ENGLISH
Description:
2 maps on 2 sheets ;each 35 x 69 cm., sheets 105 x 127 cm. and 91 x 107 cm., folded in envelope 30 x 24 cm.
Scale:
1000000
Online Only (Y/N):
N
Additional Online Files (Y/N):
N