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| | Geologic maps of the Olympic Peninusula |
 | | Haeussler, P.J., Yount, Jim, and Wells, R.E., 1999, Geologic map of the Uncas 7.5' Quadrangle Jefferson and Clallam Counties, Washington, U.S. Geological Survey Open-File Report OF99-421, scale 1:24,000, http://wrgis.wr.usgs.gov/open-file/of99-421. |
 | | Rau, W.W., 1979, Geologic Map in the Vicinity of the Lower Bogachiel and Hoh River Valleys, and the Washington Coast, Washington Division of Mines and Geology, Geologic Map GM-24, scale 1:62,500. |
 | | Rau, W., W., 1986, Geologic Map of the Humptulips Quadrangle and Adjacent Areas, Grays Harbor County, Washington, Washington Division of Geology and Earh Resources, Geologic Map GM-33, scale 1:62,500. |
| geomaps.wr.usgs.gov /pacnw/nc/pnwolypage.html (569 words) |
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