The HSU Map Collection(see link below) contains many state level or country level geologic maps. In the HSU Library Catalog(see link below) limit to the "Map Collection" and do a keyword search using the keywords geolog? and [the name of a state or country]. Listed below are selected general world and United States geologic maps available in print in the HSU Library or on the Internet.
US Geological Survey publishes maps in the following series. The Publications Warehouse(see link below) allows one to search for USGS publications by author, title, subject, or series. The Advanced Search(see link below) option allows one to search or browse by series or limit to publications that are online or that can be downloaded for GIS applications. Print publications of the US Geological Survey are found in the US Government Documents Collection(see link below).