File:Underground water resources of Iowa (1912) (14789914313).jpg

Identifier: undergroundwater00nort (find matches)
Title: Underground water resources of Iowa
Year: 1912 (1910s)
Authors: Norton, William Harmon, b. 1856 Hendrixson, Walter Scott, 1859- (from old catalog) joint author Simpson, Howard E. (Howard Edwin), 1874-1938, joint author Meinzer, Oscar Edward, 1876- (from old catalog) joint author Iowa. Geological survey. (from old catalog)
Subjects: Water-supply
Publisher: Washington, Govt. print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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County the channel is aggraded with river sand beneathand glacial stony clays above. At Stanwood it is filled with sandto a height of 116 feet above its floor of rock. At Henry Britchersplace sand 144 feet thick is reported overlying rock. In some wellsthese sands are replaced by glacial pebbly clays and the work of thedriller is much lightened. The sand is generally of fine grain, andthat in one well is reported as so fine as to sift through a tobaccosack. It contains streaks and beds of coarser sand and even of gravel.It presents a serious problem for the driller, for though it is saturated,it is for the most part too fine for ordinary types of strainers andaffords no ground for casing. The water which makes it a quicksandforms an inexhaustible reservoir, supplying the gravels at its baseand the upper creviced layers of the bedrock. CEDAR COUNTY. 369 No deep country is reported in Pioneer Township, and althoughthe land is considerably diversified in relief, water is found generally
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Figure 4.—Map showing location of wells (•) marking the position of the buried Stanwood channelNumbers on wells refer to table on p. 372. from 80 to 100 feet from the surface in Niagara dolomite. In thenortheastern part some wells are drilled as deep as 140 feet.36581°—WSP 293—12 24 370 UNDERGROUND WATER RESOURCES OF IOWA. Outside the deep buried Stanwood channel wells in FremontTownship are of moderate depth. West of this channel rock is gen-erally entered at from 80 to 100 feet. Northeast of Mechanicsvilleit comes within 30 to 50 feet of the surface and water is obtainedin abundance by wells 80 or 90 feet deep. In sees. 21 and 28 rocklies lower than 150 and 170 feet below the surface of the gently-rollingKansan upland, indicating here a branch of the Stanwood Channel.These wells, like many wells of the main channel, find water at topof the river sand with which these buried valleys have been deeplyfiUed. In the northern half of Dayton Township rock outcrops or is foundnear

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