Geologic Map of Oregon

This Geologic map of Oregon consists of semi-transparent colored polygons that cover the entire state.

Click on a colored area to get the applicable geologic unit symbol. Then open up the Legend to look up the symbol and the characteristics of that geologic unit.

Oregon Geologic Map

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1991 Geologic Map of Oregon produced by the USGS at a 1:500 scale (Walker, GW and MacLeod NS) and updated in 1992 and 1993.


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