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(dolomitic limestone) make up the major aquifer system in the Twin Cities. The St. Peter Sandstone <br />overlies the Prairie du Chien Group in some locations and in a few location (such as in Minneapolis). <br />the Platteville Formation is the uppermost bedrock. <br />2.2 Geologic Conditions in the Eik River Area <br />Elk River is located near the western edge of the Hollandale Embayment. Many of [he bedrock emits <br />chat are present beneath Minneapolis and St. Paul are not present undernctth F,Ik River neither they <br />were never deposited or were long ago eroded away). A Lew miles west of Elk River, even the Mt. <br />Simon and Hinckley Formations are not present. <br />P~.AMpls~23 MNV71A.371105 W:ne~ Supply Altcmati ve Study\Flnal Denveeables\~V~amativu Kaport finnl.doc '~ <br />Figure 3 Uppermost Bedrock in the Vicinity of Elk River <br />