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U.S. Geological Survey Open-File Report 2012–1138

Map Showing Extent of Glaciation in the Eagle Quadrangle, East-central Alaska

By Florence R. Weber and Frederic H. Wilson

Thumbnail of and link to report PDF (12.8 MB)Introduction

This map covers the Eagle 1:250,000-scale quadrangle in the northeastern part of the Yukon-Tanana Upland in Alaska. It shows the extent of five major glacial advances, former glacial lakes, and present fragmented terrace deposits related to the advances. The Yukon-Tanana Upland is an area of about 116,550 km² between the Yukon and Tanana Rivers in east-central Alaska that extends into the western part of the Yukon Territory of Canada. Traditionally, the Yukon-Tanana Upland was thought to be a part of unglaciated central Alaska, however, a rather long history of localized alpine glaciation during Pleistocene and possibly Tertiary time can be shown. Deposits of five of the glacial episodes can be found in the Eagle quadrangle. This report is an outcome of studies conducted in conjunction with bedrock mapping intended for mineral resource assessment.

  • This report is available only on the Web.

For additional information contact:
Alaska Science Center staff
U.S. Geological Survey
4210 University Dr.
Anchorage, AK 99508
Alaska Mineral Resources
Alaska Science Center

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Suggested citation:

Weber, F.R., and Wilson, F.H., 2012, Map showing extent of glaciation in the Eagle quadrangle, east-central Alaska: U.S. Geological Survey Open-File Report 2012–1138, scale 1:250,000. (Available at http://pubs.usgs.gov/of/2012/1138/.)




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