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<br />TYPICHL CROSS SECTION OF HELPT 5ERIES <br />hor- 12on <br />sa I ~.3ge E1 ....~ <br />depth ---------;~ <br />E2 ...... <br />(10 in. ) <br />diagraM <br />characteristics <br />0 to 5 in., clay Ioa~~i, hard, <br />,,~~ sticky, plastic, calcareous <br />--- 5 to 8 in., hea~,~y clay IoaM, <br />blocked, Mod. alkaline. <br />--- 8 to 23 in.,silty clay,extr•erre. <br />hard,~~ery sticky and plastic, <br />strongly alkaline and calcareous <br />--- 23 to 41 in., silty caly, <br />extreMely hard, strongly alb;aline <br />soft Masses of calciuM <br />--- 41 tc 6u in. , si I t!d caly IoaM, <br />hard, sticky, plastic, Masses of <br />calciuM carbonate, calciuri <br />sulfate crystals <br />E3ca .. . <br />Cca .... <br />FIGURE 6 <br />