USGS Open-File Report 95-0526: Digital Files of Geologic Map Symbols With Cartographic Specifications
Prepared in cooperation with the Federal Geographic Data Committee, Geological Data Subcommittee, and the Association of American State Geologists Nearly 900 symbols with cartographic specifications for geologic maps are provided with U.S. Geological Survey Open-file Report 95-526. The symbols were prepared for U.S. Geological Survey Open-file Report 95-525, ‘Cartographic and Digital Standard for Geologic Map Information.’ Symbols in the ‘eps’ files should be used in conjunction with the printed draft standard for it explains the application and proper use of the symbols as well as the content and the color and pattern standards for geologic maps. The symbols can be imported into programs, such as, but not limited to, Adobe Illustrator, Corel Draw, and AutoCad. The original release is on two DOS diskettes. Source.