The geo_nbmg.zip file contains a dbase III+ file of geothermal sites that was developed to refine the location of various geothermal sites identified in NBMG Open-File Report 94-2 by Larry Garside. The locations contained within the database were generated by digitizing identified or plotted locations from U.S. Geological Survey 7.5 minute topographic maps. Many of the records have been cross referenced to Nevada locations listed in the U.S. Geological Survey GEOTHERM database and/or NBMG Bulletin 91, "Thermal Waters of Nevada." Only selected information from this data set was used in Open-File Report 94-2. The entire data set is not part of the published report and it has not been reviewed for accuracy or completeness. We are placing this database, as is, on the NBMG web/ftp site because it does reference approximately 2,700 locations that may be potential geothermal sites and it is deemed to be potentially useful to the geothermal user community. For questions about this data set or the U.S. Geological Survey GEOTHERM data set, contact Ron Hess by e-mail: rhess@unr.edu or by phone at (775) 784-6691 ext. 121.
The following is the reference to this database, found in Nevada Bureau of Mines and Geology Open-File Report 94-2, by Larry Garside:
Topographic Map Digital DataA complete examination was made by David A. Davis at NBMG of the approximately 1,900 7.5 minute topographic maps for Nevada. The entire state has this coverage, and a visual examination was made of each map for any mention of hot or warm springs, geothermal wells, etc. In addition, a 1981 version of GEOTHERM was available in paper copy (Jim Bliss, written commun., 1981) and this was used to identify other geothermal spring and well locations on these topographic maps. About 2700 individual points were marked on the maps, and the locations were digitized in the NBMG GIS laboratory using ARC/INFO software, a CalComp 9500 digitizer, and digital map coordinate data (TIC file) from the USGS. A database of the location and other data collected for this part of the project was created, and about a dozen records in the final table were from the spreadsheet equivalent of that database. In general, the records from this database were for locations in Open-File Report 94-2 where no data were available in other sources. The references are usually the 7.5 minute quadrangle maps that the springs or wells appear on. Additionally, when more precise longitude and/or latitude locations were required for records taken from any of the other sources used, the appropriate information from this database was entered in intermediate spreadsheets of selected records and eventially reported in Open-File Report 94-2.
The following is the dBase III+ database file description:
GEO_NBMG.DBF Data FilePC-FILE DATABASE DESCRIPTION
Printed: 06/05/2000 at 13:47 by PC-File Version 7, Single-user (Dec 17 1993)
Database: GEO_NBMG
Description: Geo_NBMG Nevada Geothermal Locations - Draft 1994
==========DATABASE STRUCTURE - FIELD DESCRIPTIONS======= # NAME TYPE LENGTH DEC DATA CONTENT 1. GEO1_G N 11 0 System ID number 2. GEO1_G_ID N 11 0 System ID number 3. NAME C 40 Spring, well name, etc. 4. ALT_NAME C 40 Alternate spring or well name 5. QUADRANGLE C 40 7.5 minute USGS topographic map that covers site 6. SCALE N 10 0 Scale of USGS topographic map 7. YEAR N 2 0 Year USGS topographic was published 8. LOCATION N 1 0 Location accuracy value? 9. COUNTY C 10 County that site is located in 10. TOWNSHIP C 3 Township 11. RANGE C 3 Range 12. SECTION N 2 0 Section number 13. LONGITUDE C 12 Longitude from GEOTHERM or Bulletin 91 14. LATITUDE C 11 Latitude from GEOTHERM or Bulletin 91 15. GRECORD N 7 0 GEOTHERM cross reference number 16. SOURCE_TYP C 10 Spring, well, other 17. TEMP_C N 5 1 Temperature in degrees C 18. GEOCHEM C 1 Yes if water chemistry existed in GEOTHERM or Bulletin 91 19. X_REFB91 C 4 Cross reference to site in Bulletin 91 20. REMARKS C 60 RR=related record number, TEMP=temperature from other source, TRS UNSURVEYED=no township/range survey available on map, and other general comments 21. X_COORD N 13 5 Digitized longitude from 7.5 minute map, negative value decimal degrees 22. Y_COORD N 13 5 Digitized latitude from 7.5 minute map, positive value decimal degrees
Ron Hess, June 2000