Geologic map and sections of the Willow Creek 15ʹ quadrangle, Humboldt and Trinity Counties, California [cartographic material] / by J.C. Young, 1978.
Relief shown by contours and spot heights. "Contour interval 100 feet." Fault lines indicated. "Geology mapped by J.C. Young." "Topographic base by U.S.G.S." Location map on envelope. Accompanied by booklet: Geology of the Willow Creek 15ʹ quadrangle, Humboldt and Trinity Counties, California / by John C. Young. [San Francisco, Calif.] : California Division of Mines and Geology, 1978. Map sheet (California. Division of Mines and Geology) 31. Includes 3 geologic cross sections, diagram, and location maps.
- California Division of Mines and Geology
- Held by
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