Geological Map of the State of California Issued by State Mining Bureau compiled under the Direction of Fletcher Hamilton State Mineralogist Geology by James Perrin Smith - Geographical legend includes county boundaries, County seat towns, other towns and places, railways, state highways, other roads, electric transmission lines, oil and gas pipe lines, springs and wells, Spanish land grants, plus the map is color coded by the Rock deposits and time (see image) and the color has remained bright and in good condition. measures 5' x 45" wide - linen backed - Provenance: The heirs of the estate of Colonel Thomas Baker, California Homesteader and Pioneer Measures 60" x 45"