Geology of the Standing Rock and Cheyenne River Indian reservations, North and South Dakota

Because of growing stocks of grain and the reinstitution of production controls, the question of what allocative impacts such controls imply is once again relevant. The prospect that restrictions on land use may initiate an intensification in the use of substitute inputs such as fertilizer, which are already high in price, is discouraging. Although the issue is an old one, empirical evidence on the extent of these effects is incomplete.1 The purpose of this article is to derive a convenient means of measuring the allocative effects of changes in input restrictions. As an example of empirical application, results are presented which indicate the impact of acreage restrictions during the marketing quota years in North and South Dakota.

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Effect of bicarbonate and phosphate on arsenic release from mining-impacted sediments in the Cheyenne River watershed, South Dakota, USA

Environmental Science Processes & Impacts ◽

10.1039/c8em00461g ◽

2019 ◽

Vol 21 (3) ◽

pp. 456-468 ◽

Cited By ~ 3

Author(s):

Cherie L. DeVore ◽

Lucia Rodriguez-Freire ◽

Abdul Mehdi-Ali ◽

Carlyle Ducheneaux ◽

Kateryna Artyushkova ◽

...

Keyword(s):

South Dakota ◽

River Watershed ◽

Cheyenne River

We investigated the effect of competing environmentally relevant anions (PO43−,HCO3−) on the release of As from solids (WW, DR) collected from the Cheyenne River watershed exposed to surface oxidizing conditions.

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Duodenal Injury in the Dakotas: A 15-Year Review of Duodenal Injury in the Level II Trauma Centers of North and South Dakota

The American Surgeon ◽

10.1177/000313482008600401 ◽

2020 ◽

Vol 86 (4) ◽

pp. 170-172

Author(s):

David Ray Velez ◽

Leah Hustad ◽

Mary O. Aaland ◽

Christopher J. Maki ◽

Khaled Zreik

Keyword(s):

South Dakota ◽

Trauma Centers ◽

Duodenal Injury ◽

Level Ii ◽

North And South

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The Hell Creek Formation, Montana: A Stratigraphic Review and Revision Based on a Sequence Stratigraphic Approach

Geosciences ◽

10.3390/geosciences10110435 ◽

2020 ◽

Vol 10 (11) ◽

pp. 435

Author(s):

Denver Fowler

Keyword(s):

South Dakota ◽

Lake Area ◽

Sequence Stratigraphic ◽

Hell Creek Formation ◽

Accommodation Space ◽

The North ◽

Marine Influence ◽

Sequence Boundaries ◽

North And South ◽

Upper Maastrichtian

The Upper Maastrichtian fluvial Hell Creek Formation of the Fort Peck Lake area, Montana (and regional equivalents) is notable for its vertebrate fossils and for the K-Pg mass extinction at or near its upper contact. Despite intense study, internal stratigraphy of the Hell Creek Formation is still poorly constrained, hindering study. This work reviews the stratigraphy of the Hell Creek Formation, as currently understood, and proposes important revisions to the recently proposed type section, particularly concerning complexity of the Hell Creek Formation basal contact. This work also subdivides the Montanan Hell Creek Formation into four 4th order depositional sequences, superimposed over a 3rd order marine transgression. Sequence boundaries are defined by four, laterally continuous disconformities formed by pauses in the creation of accommodation space, marked by overlying amalgamated channel complexes, or less commonly, correlative interfluve paleosols. Cyclicity in Montana may be correlative with similar 4th order cyclicity and marine influence documented in North and South Dakota, Alberta, and Saskatchewan. Magnetostratigraphy and new biostratigraphic data support correlation of the upper Montanan sequence with the North Dakotan Cantapeta tongue (and overlying fines) and Canadian Scollard and Frenchman Formations.

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