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U.S. Geological Survey Open-File Report 2009-1254

Preliminary Bedrock Geologic Map of the Seward Peninsula, Alaska, and Accompanying Conodont Data

By Alison B. Till, Julie A. Dumoulin, Melanie B. Werdon, and Heather A. Bleick


Thumbnail of and link to report PDF (14.2 MB)

This 1:500,000-scale geologic map depicts the bedrock geology of Seward Peninsula, western Alaska, on the North American side of the Bering Strait. The map encompasses all of the Teller, Nome, Solomon, and Bendeleben 1:250,000-scale quadrangles, and parts of the Shishmaref, Kotzebue, Candle, and Norton Bay 1:250,000-scale quadrangles (sheet 1; sheet 2).

The geologic map is presented on Sheet 1. The pamphlet includes an introductory text, unit descriptions, tables of geochronologic data, and an appendix containing conodont (microfossil) data and a text about those data. Sheet 2 shows metamorphic and tectonic units, conodont color alteration indices, key metamorphic minerals, and locations of geochronology samples listed in the pamphlet.

         GIS data

  • Database files (67 MB total). (includes data, metadata, readme file, .CSV files, .DBF files, Export files, FileMaker Pro 7 files, Shapefiles, shadeset and style files.
  • 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

Part of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Till, A.B., Dumoulin, J.A., Werdon, M.B., and Bleick, H.A., 2010, Preliminary bedrock geologic map of the Seward Peninsula, Alaska, and accompanying conodont data: U.S. Geological Survey Open-File Report 2009-1254, 2 plates, scale 1:500,000, 1 pamphlet, 57 p., and database.

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