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Data Base and Map Preparation
Boxplots showing ranges of a dissolvedsolids concentrations grouped by hydrochemical facies
anion aquifer and adjacent Ashworth Balcones fault zone basal Cretaceous sand bonate boxplots brines calcite calcium bicarbonate water calcium sulfate water Capitan aquifer carbonate rocks Cenozoic chloride facies concentrations and hydrochemical concentrations in water data base depths of sampled Dockum aquifer dolostone Edwards aquifer Edwards Plateau Edwards-Trinity aquifer system evaporite facies in water freshwater zone freshwater/saline-water transition zone Glen Rose grid blocks grouped by hydrochemical hydraulically connected hydrochemical facies interquartile range irrigation return flow limestone lower Trinity zones map of dissolved-solids median concentration median dissolved-solids concentration mg/L middle Trinity mineral composition nitrate concentrations northwestern number of oil oil and gas Pecos County principal aquifer Reagan Counties recharge Reeves County Rustler aquifer slightly saline water solids concentrations source of sulfate Stockton Plateau sulfate and chloride Texas Water Development tion Toyah basin Trans-Pecos Triassic Trinity aquifer U.S. Geological Survey upper Trinity Upton Counties Water Development Board water-quality water-yielding zone west-central Texas