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Open-File Report 2011-1234

Preliminary Geologic Map of the Island of Saipan, Commonwealth of the Northern Mariana Islands

By David J. Weary and William C. Burton



This map provides an update and reinterpretation of the geology of the island of Saipan. The geology of the island was previously documented in 1956 in U.S. Geological Survey (USGS) Professional Paper 280-A by Preston E. Cloud, Jr., and others. This report includes a geologic map at a scale of 1:25,000. The fieldwork for this project was performed in 2006 and 2007.

Revised November 4, 2011

First posted September 12, 2011

  • Map PDF (17.2 MB)
    • For additional information contact:
      David J. Weary
      U.S. Geological Survey
      12201 Sunrise Valley Drive
      Reston, VA 20192

      Part or all 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:

    Weary, D.J., and Burton, W.C., 2011, Preliminary geologic map of the island of Saipan, Commonwealth of the Northern Mariana Islands: U.S. Geological Survey Open-File Report 2011-1234, scale 1:25,000, 1 sheet, available at

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