USGS
About the USGS Photo Library The U.S. Geological Survey (USGS) Central Regional Library maintains a collection of over 400,000 photographs taken during geologic studies of the United States and its territories from 1868 to the present. These images provide a visual history of the discovery, development, and sciences of the United States and its Geological Survey. Some photographs have been used in USGS publications, but most have never been published. Currently, this website represents less than 10 percent of the Library's images with approximately 30,000 photographs on-line. Please visit the "Latest Additions" menu at the top of this page for regular updates of photographs to the website Summary provided by http://libraryphoto.cr.usgs.gov/about_library.htm
DOI/USGS/PHOTO-LIB/ES