1. Preliminary geologic map of the Honker Bay quadrangle, Solano and Contra Costa Counties, California [cartographic material] Yale Public content 1980. 2002-06-01T04:00:00Z. 2023-01-05T04:01:21Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. California, Solano County, Contra Costa County, Solano County (Calif.), and Contra Costa County (Calif.).