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A38 REGIONAL AQUIFER-SYSTEM ANALYSIS--CENTRAL VALLEY, CALIFORNIA <br /> 123`_ 122` 121` 120' 119° 118° <br /> Red BIuH <br /> • EXPLANATION <br /> 40' WATER TYPES <br /> ■ Magnesium bicarbonate <br /> . Calcium bicarbonate <br /> F1Sodium bicarbonate <br /> Sul <br /> Sar, Magnesium sodium bicarbonate or <br /> sodium magnesium bicarbonate <br /> �f Calcium magnesium bicarNmate or <br /> magnesium calcium bicarbonate <br /> L <br /> ■ Sodium calcium bicarbonate or <br /> calcium sodium bicarbonate <br /> Calcium, magnesium,sodium, chloride, <br /> ~ sulfate,and bicarbonate may occur <br /> 5 c tc in any combination <br /> ❑ Sodium or calcium,chloride or sulfate are <br /> y most common in various combinations <br /> No data <br /> 38' <br /> ti <br /> 19 <br /> Alluvial- <br /> boundary <br /> 37' <br /> �f7�lS" <br /> 0 50 100 MILES <br /> 0 50 100 KILOMETERS <br /> Sake <br /> 35° <br /> FIGURE 25.--Chemical types of ground water in the Central Valley. Gordon, 1968;Page and LeBlanc, 1969; Bertoldi, 1971;Hotchldss <br /> [Chemical types shown are approximated froin maps and descrip- and Balding, 1971; Page and Balding, 1973; Sorenson, 1981; <br /> tions in the following reports:Davis and Poland, 1957;Wood and Fogelman, IM;Evenson, 1%5;Johnson, 1985.1 <br /> Davis,1959;Wood and Dale,1964;Dale and others,1966;Croft and <br />