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<br />. <br /> <br />r <br /> <br />"'4"_."'. "__ _ __~ _u_.~.. <br /> <br />..~:..::::;.:.r... . <br /> <br />l <br />CO) <br />J <br /> <br />PARt' !II: <br /> <br />COLORADO RIVER BASIN <br /> <br />1 <br /> <br />part of tme basin and to the head~aters of the Colorado River. <br /> <br />; <br />I <br />J <br />I <br />.! <br />~i <br />"-i <br />, <br />I <br />.; <br /> <br />Cbncentra~ions of dissolved solids in these areas is generally <br /> <br />less than ~OO m~l and in many places is less than 250 m~/l. <br /> <br />GCound wa~r havin~ the highest concentration of dissolved solids. <br /> <br />is; in areas underlai~ by extensive marine shale and siltstone <br /> <br />,. <br /> <br />, <br />.1 <br /> <br />formations. The concentrations of dissolved 50lids in wate~ <br /> <br />. <br /> <br />from these .formations, which. are most widely expo:;ed in the <br /> <br />~thwestern and central parts of the basin, typically range <br /> <br />~om about ~,OOO mg/l. to 3,000 mg/l. <br /> <br />cv <br />l;;t <br />C::> <br /> <br />o <br /> <br />. <br /> <br />/2... <br /> <br />r-"I <br /> <br />: I <br />i <br />t " <br />i. <br />j <br /> <br />I <br />1 [ <br />~~: I <br /> <br />4 tf-/ <br />