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U.S. Geological Survey Open-File Report 2009-1186

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# Preliminary Geologic Map of the Buxton 7.5' Quadrangle, Washington County, Oregon

#### By Philip A. Dinterman and Alison R. Duvall

| ABSTRACT
This map, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Buxton 7.5-minute quadrangle.  The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller.  

This plot file and accompanying database depict the distribution of geologic materials and structures at a regional (1:24,000) scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes. | First posted October 9, 2009
     **File for viewing and plotting**
-  **Map** PDF (2.5 MB) 

     **Data**
-  **Readme file**  .txt (16 kB) 
-  **Metadata file**  .txt (48 kB) 
-  **Geodatabase package**  .zip (2.5 MB) 
-  **Shapefile package**  .zip (3.3 MB) 
- This report is available only on the Web.

**For additional information:**Contact Information, Western Region Geology and Geophysics Science Center—Menlo ParkU.S. Geological Survey345 Middlefield Road, MS-989Menlo Park, CA 94025-3591http://geomaps.wr.usgs.gov/

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. |
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### Suggested citation:

Dinterman, Philip A., and Duvall, Alison R., 2009, Preliminary geologic map of the Buxton 7.5' quadrangle, Washington County, Oregon:  U.S. Geological Survey Open-File Report 2009-1186, scale 1:24,000 and database.

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