New Article

December 2010

Fusulinids from the Howe Limestone Member (Red Eagle Limestone, Council Grove Group) in Northeastern Kansas and their Significance to the North American Carboniferous (Pennsylvanian)-Permian Boundary, Gregory P. Wahlman and Ronald R. West

Abstract

Fusulinids from the Howe Limestone Member (upper part of the Red Eagle Limestone, lower part of the Council Grove Group) are described here for the first time. The fauna is particularly significant because it represents the first fusulinids known above the new conodont-based midcontinent Carboniferous (Pennsylvanian)-Permian boundary at the Glenrock Limestone Member-Bennett Shale Member contact in the lower part of the Red Eagle Limestone.

New Article

June 2010

Temporal Variability in the Quality of Produced Water from Wells Tapping the Ozark Aquifer of Southeast Kansas, P. Allen Macfarlane

Abstract

State and local agencies have become concerned that the available water supply from the Ozark aquifer in the Tri-state region of southeast Kansas, southwest Missouri, and northeastern Oklahoma may become unusable or require additional water treatment because of deteriorating quality resulting from overdevelopment. Many southwest Missouri and southeast Kansas water supplies withdraw water from a 30-60-mi (48-96-km)-wide transition zone in the Ozark aquifer that separates calcium, magnesium-bicarbonate ground water with low dissolved solids to the east from sodium-chloride brines to the west. Water-quality deterioration within the transition zone could potentially come about as a result of eastward migration or upward movement from deeper horizons of saline water. This study assessed variability in the quality of water produced from wells within the transition zone in southeast Kansas across a variety of time scales.

New Article

April 2010

New Insights on the Sequence Stratigraphic Architecture of the Dakota Formation in Kansas-Nebraska-Iowa from a Decade of Sponsored Research Activity, Greg A. Ludvigson, Brian J. Witzke, R. M. Joeckel, Robert L. Ravn, Preston Lee Phillips, Luis A. González, and Robert L. Brenner

Abstract

The Cretaceous Dakota Formation in the areas of Kansas, Nebraska, and Iowa contains a rich and well-preserved microflora of fossil palynomorphs. A comprehensive listing of these taxa is presented in this publication as part of a continuing effort to develop a refined biostratigraphic scheme for mid-Cretaceous terrestrial deposits in North America.

New Article

February 2010

Treated Wastewater and Nitrate Transport Beneath Irrigated Fields near Dodge City, Kansas, Marios Sophocleous, Margaret A. Townsend, Fred Vocasek, Liwang Ma, and Ashok KC

Abstract

Use of secondary-treated municipal wastewater for crop irrigation south of Dodge City, Kansas, where the soils are mainly of silty clay loam texture, has raised a concern that it has resulted in high nitrate-nitrogen concentrations (10-50 mg/kg) in the soil and deeper vadose zone, and also in the underlying deep (20-45 m) ground water. The goal of this field-monitoring project was to assess how and under what circumstances nitrogen (N) nutrients under cultivated corn that is irrigated with this treated wastewater can reach the deep ground water of the underlying High Plains aquifer, and what can realistically be done to minimize this problem.

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Current Research in Earth Sciences is a peer-reviewed publication of the Kansas Geological Survey. More ...

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