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OREGON GEOLOGY - GENERAL OVERVIEW OF FORMATIONS PRESENT |
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A geology map, together with legend, is shown below. The locations of roads and towns are approximate. Refer to any standard road map to get more precise data. The legend below is for western Oregon. |
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To place the geology of Oregon in the context of the earth's history (4.6 billion years), visit State of Oregon -- Missing Geology. For more information about how to use the various missing-geology contextual charts, click on Overview of Geology Charts Project above. |
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