The USGS Field Records Collection in Denver, Colorado is an archive of unpublished field notes, annotated maps, sketches, correspondence, analysis reports, and other data created or collected by more than 1200 USGS scientists during field studies and exploration of the continental United States, Hawaii, and other locations around the world. Materials in the collection represent almost 130 years of scientific investigations by the USGS, from the earliest days of the agency to recently completed projects. The collection includes 3,500 linear feet of document containers, 20,000 maps, more than 80,000 aerial photographs. Materials in the collection are managed as Federal records to ensure ongoing access for future researchers. Field Records Collection staff provides reference and research assistance to USGS scientists, researchers from other Federal and State agencies, and the general public. Detailed collection inventories with references to associated USGS publications are available for search, browse, and download from the Field Records Collection website at: http://www.cr.usgs.gov/fieldrecords; however, this site is not available at this time. For more information, please contact the USGS Library in Denver: http://library.usgs.gov/denlib.html.