Origin of surface lineaments in Nemaha County, Kansas
Linear and curvilinear features detected on remote sensing imagery were correlated to drainage patterns in Nemaha County. The influence of the Nemaha Ridge on present drainage networks appears significant. The Humboldt Fault was shown to breach the surface in the Fourmile Creek drainage basin near Bern, Kansas, offsetting Permian and Pennsylvanian beds by 54 to 74 m. Steep aeromagnetic and gravity gradients are superimposed over the trace of the Humboldt Fault zone and are likely related to it. The geophysical data suggest a complexly-fractured basement surface. Several of the linear trends apparent on the aeromagnetic map coincide with present drainage trends. Available subsurface well information was used to generate a modified interpretation of the Precambrian surface configuration compatible with geophysical and surface observations. Underlying structure, especially on the west side of the Humboldt Fault zone where basement rocks are relatively shallow, is believed to exert considerable control over present drainage patterns. A lineament formed by two streams near Baileyville, Kansas suggests recent movement in glacial deposits. 17 figures.
- Research Organization:
- Kansas Geological Survey, Lawrence (USA)
- OSTI ID:
- 6241170
- Report Number(s):
- NUREG/CR-0321
- Country of Publication:
- United States
- Language:
- English
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