1. Preliminary geologic map of the Medford 1° x 2° quadrangle, Oregon and California [cartographic material] Yale Public content 1982. 2023-06-02T16:51:48Z. 2023-06-03T03:02:00Z. Smith, James G., 1939- author. U.S. Geological Survey. English. cartographic image. Public. Oregon, Medford, and Medford Region.