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<br />MATERIALS TESTING SERVICE <br /> <br />The Wenner Electride spacing-arrangement was used in this <br />evaluation which, therefore, indicates that the electrode <br />separation is parallel. to the-depth under the central test <br />point. Electrode separation of twenty_feet indicates a test <br />depth of twenty feet. <br /> <br />The cummulative readings are indicated by layer resistivity <br /> <br /> <br />which depicts the values as a decreasing function of resis- <br /> <br /> <br />tanc.e:;~:c:-.The__:Ies:i-sti'Wi;t.y; ~--epres.en~innS'-"'aTe'ela ttradhe-cl:~s=""" - - <br /> <br /> <br />"Figures ,,1""12" in __this-:--r_eport. -c . <br /> <br />OBSERVED FIELD GEOLOGY: <br /> <br /> <br />The Chicago Creek basin of the Mount Evans region has a re- <br /> <br /> <br />centcgeologic-history-which points toward .origin- of the-site <br /> <br /> <br />encountered soil._ The Mount_Evans_area_was prominent in the <br /> <br /> <br />region prior to the Laramide Orogeny of the late Cretaceous <br /> <br /> <br />Age. - The Laramide Orogeny created most of the Rocky Moun- <br /> <br /> <br />tains and further. enhanced .the --height-of the Mount Evans area.- <br /> <br /> <br />Following the Laramide Orogeny, the valleys and upper lakes <br /> <br /> <br />were cut during the Ice Glacier Stages of the Tertiary and <br /> <br /> <br />Quaternar~time-periods. <br /> <br />The Cretaceous sediments__weraground_ by -the-. glacial action <br /> <br /> <br />which fur-the red the weathering cycle of the crystaline rock <br /> <br /> <br />material into rock flours,-and:-:clays. During the ~etreat of <br /> <br />I <br /> <br />ENGINEERS __ <br /> <br />_=-4- <br />