Geologic map of the Greater Portland Metropolitan Area and surrounding region, Oregon and Washington / by Ray E. Wells [and thirteen others] ; prepared in cooperation with the Oregon Department of Geology and Mineral Industries and Washington Geological Survey
Scale 1:63,360 (W 123°22ʹ30ʺ--W 122°15ʹ00ʺ/N 46°00ʹ00ʺ--N 45°15ʹ00ʺ).
Note
Relief shown by shading, contours and spot heights. Includes text, color illustrations, ancillary map, location map and three index maps.
Bibliography Note
Includes bibliographical references in pamphlet (pages 43-51)
Action Note
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