Bedrock surface, of slate, exposed in preparing foundation for south abutment of "Barrier No. 1", Yuba River. Yuba County (?), California. no date.
Summary
Bedrock surface, of slate, exposed in preparing foundation for south abutment of "Barrier No. 1", Yuba River. Compare 2707. Yuba County (?), California. no date.
Summary
Bedrock surface, of slate, exposed in preparing foundation for south abutment of "Barrier No. 1", Yuba River. Compare 2707. Yuba County (?), California. no date.
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Available in the U.S. Geological Survey Denver Library Photographic Collection, Gilbert, G.K. Collection.
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