U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Database of significant deposits of gold, silver, copper, lead, and zinc in the United States Part B: Digital data. by Keith R. Long (1), John H. DeYoung, Jr. (2), and Stephen D. Ludington (3) Open-File Report 98-206B This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this program has been used by the USGS, no warrenty, expressed or implied, is made by the USGS as to the accuracy and functioning of the program and related program material, nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. 1998 (1) U.S. Geological Survey, Tucson, AZ, 85719 (2) U.S. Geological Survey, Reston, VA, 20192 (3) U.S. Geological Survey, Menlo Park, CA, 94025 This is Disk 1 of 1 which contains the following files: SD4.xls (Microsoft Excel 4.0) Spreadsheet with the significant deposits database described in Open-File Report 98-206A. SDREF.doc (Microsoft Word 6.0) References cited in the spreadsheet SD4.xls. To read all of these files the user will require an IBM-compatible computer with wordprocessor and spreadsheet software capable of reading Microsoft Word 6.0 and Excel 4.0 files.