It reflects newsworthy topics such as water contamination, water shortages, and geologic and hydrologic hazards. The packet includes a teachers guide, poster, materials covering each study area, role-playing activities for students, photographs, and scientific data about population, geology, and water use. Customer requests should be submitted on school letterhead. This fact sheet, FS 225-96, dated April 1998, supercedes all previous editions. DOQ's covering approximately 30 percent of the conterminous United States are served online as JPEG image tiles during the 18 month testing period.
Users can view a resampled image and then download it to their own computer at no charge.
Those wishing to purchase full resolution, uncompressed DOQ files will be linked to a USGS Web site that provides ordering information. The CD contains vector-based digital geologic maps of the surficial deposits in parts of 23 states where continental glaciation occurred during the Quaternary. The CD can be used with UNIX, Window, or Macintosh operating systems. A viewer for the PDF files is provided.