National Geologic Map Database
General Information
- Title: Base of the John Day Formation in and near the Horse Heaven mining district, north-central Oregon
- Author(s): Swanson, D.A., and Robinson, P.T.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Professional Paper 600-D
- Larger Work: Geological Survey Research, 1968
- Publication Date: 1968
- Map Scale: 1:408,000
- Cross Section: Yes
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Additional Resources
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.