Questa Baseline and Pre-Mining Ground-Water Quality Investigation. 25. Summary of Results and Baseline and Pre-Mining Ground-Water Geochemistry, Red River Valley, Taos County, New Mexico, 2001-2005 Revision History for USGS Professional Paper 1728 -------------------------------------- First posted online May 2, 2008 -------------------------------------- Revised March 18, 2009 Errata: 1. p. 4: page number for geochemical controls on dissolved calcium concentrations should be 62, not 59. 2. p. 4: page number for geochemical controls on dissolved strontium concentrations should be 67, not 65. 3. p. 4: page number for geochemical controls on dissolved barium concentrations should be 70, not 67. 4. p. 58: figure 31 is incorrect and should be replaced by the attached figure for silica. 5. p. 89: table 11 has two incorrect entries for the 3rd column (Range of values…). Sulfate should be 1,300- 3,100, not 1,300-3,600 and dissolved solids should be 2,400-4,300, not 2,400-2,500. 6. p. 90: table 12 has two incorrect entries. In column 2 (Values, in mg/L), Sulfate should be 4,300 instead of 3,600 and dissolved solids should be 4,300 instead of 2,500. 7. p. 95: table 17 has an incorrect entry. In column 2, the range for fluoride should be 1.4–6.8, not 1.4–68. 8. Figure 31 Rpt 25 was also replaced. --------------------------------------