Geologic map of the Portland quadrangle, Multnomah and Washington counties, Oregon, and Clark County, Washington

This archived document is maintained by the Oregon State Library as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Relief shown by contours and spot heights."Contour interval 10 feet.""Field work conducted in 1990."Includes text, table, and 2 cross sections and quadrangle location map.Includes bibliographic references.Mode of access: Internet from the Oregon Government Publications Collection.Text in English