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Open-File Report 2011-1010

Project Plan—Surficial Geologic Mapping and Hydrogeologic Framework Studies in the Greater Platte River Basins (Central Great Plains) in Support of Ecosystem and Climate Change Research

By Margaret E. Berry, Scott C. Lundstrom, Janet L. Slate, Daniel R. Muhs, David A. Sawyer, and Darren R. Van Sistine

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The Greater Platte River Basin area spans a central part of the Midcontinent and Great Plains from the Rocky Mountains on the west to the Missouri River on the east, and is defined to include drainage areas of the Platte, Niobrara, and Republican Rivers, the Rainwater Basin, and other adjoining areas overlying the northern High Plains aquifer. The Greater Platte River Basin contains abundant surficial deposits that were sensitive to, or are reflective of, the climate under which they formed: deposits from multiple glaciations in the mountain headwaters of the North and South Platte Rivers and from continental ice sheets in eastern Nebraska; fluvial terraces (ranging from Tertiary to Holocene in age) along the rivers and streams; vast areas of eolian sand in the Nebraska Sand Hills and other dune fields (recording multiple episodes of dune activity); thick sequences of windblown silt (loess); and sediment deposited in numerous lakes and wetlands. In addition, the Greater Platte River Basin overlies and contributes surface water to the High Plains aquifer, a nationally important groundwater system that underlies parts of eight states and sustains one of the major agricultural areas of the United States. The area also provides critical nesting habitat for birds such as plovers and terns, and roosting habitat for cranes and other migratory birds that travel through the Central Flyway of North America. This broad area, containing fragile ecosystems that could be further threatened by changes in climate and land use, has been identified by the USGS and the University of Nebraska-Lincoln as a region where intensive collaborative research could lead to a better understanding of climate change and what might be done to adapt to or mitigate its adverse effects to ecosystems and to humans. The need for robust data on the geologic framework of ecosystems in the Greater Platte River Basin has been acknowledged in proceedings from the 2008 Climate Change Workshop and in draft reports by researchers developing a multidisciplinary science plan for the Greater Platte River Basin.

First posted February 14, 2011

For additional information contact:

USGS Geology and Environmental Change Science Center
Box 25046, Mail Stop 980
Denver, CO 80225

http://esp.cr.usgs.gov/

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Suggested citation:

Berry, M.E., Lundstrom, S.C., Slate, J.L., Muhs, D.R., Sawyer, D.A., and Van Sistine, D.R., 2011, Project plan—Surficial geologic mapping and hydrogeologic framework studies in the Greater Platte River Basins (Central Great Plains) in support of ecosystem and climate change research: U.S. Geological Survey Open-File Report 2011–1010, 34 p.



Contents

Abstract

Introduction

Project Objectives

Strategy and Approach

Surficial Geologic Mapping Studies

Methodology

Communication Plan

Subtask: South Platte River Corridor, Eastern Colorado

Geologic Setting

Mapping and Research Plan

Subtask: Niobrara National Scenic River, Nebraska

Geologic Setting

Mapping and Research Plan

Subtask: Crescent Lake Wildlife Refuge Area, Nebraska

Geologic Setting

Mapping and Research Plan

Subtask: Eolian Sediments in the Greater Platte River Basins, Great Plains

Objectives

Methodology

Research Plan

Communication Plan

Hydrogeologic Framework Studies

Republican River, Nebraska and Kansas

Geologic Setting

Mapping and Research Plan

Communication Plan

References Cited in Text

Appendix—Geologic Map Coverage Index

Geologic Map Publications

Multi-State

1:5,000,000

1:1,000,000

1:500,000

Colorado

1:500,000

1:250,000

1:100,000

In progress

1:24,000

In progress

Other

Kansas

1:500,000

County

In progress

1:24,000 (in progress)

Other

Nebraska

1:250,000

1:100,000

In progress

1:62,500

1:48,000

1:24,000

In progress

Other

South Dakota

1:500,000

1:100,000 (in progress)

1:62,500

Wyoming

1:1,000,000

1:500,000

1:250,000

1:100,000

In progress

1:48,000

1:24,000

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