. Geology and water resources of a portion of Southeastern South Dakota . A. SHERRILL SPRING, ON LOWER ENEMY B. KILBURN RUN, FED BY KILBURN WELL, NORTH OF MOUNT VERNON,SOUTH DAKOTA. TODD.] MAIN ARTESIAN SUPPLY. 27 conditions: (1) Its great extent, underl3^ing most of the Great Plainsfrom the Rocky Mountains to about the ninety-fifth meridian. (2) Itshighlj^ elevated western border, located in the moist region of themountains and crossed by numerous mountain streams. (3) The factthat it is extensively sealed on its eastern margin by the overlappingclays of the Colorado formation, and wh
. Geology and water resources of a portion of Southeastern South Dakota . A. SHERRILL SPRING, ON LOWER ENEMY B. KILBURN RUN, FED BY KILBURN WELL, NORTH OF MOUNT VERNON,SOUTH DAKOTA. TODD.] MAIN ARTESIAN SUPPLY. 27 conditions: (1) Its great extent, underl3^ing most of the Great Plainsfrom the Rocky Mountains to about the ninety-fifth meridian. (2) Itshighlj^ elevated western border, located in the moist region of themountains and crossed by numerous mountain streams. (3) The factthat it is extensively sealed on its eastern margin by the overlappingclays of the Colorado formation, and where that is not the case, by thetill sheet of the Glacial epoch. (4) The excavation of wide areas,especially in Dakota, by older streams, so as to bring the land surfacebelow the pressure height or head generated by the elevated westernborder of the formation. From this source also are derived the copi-ous pumping supplies of water over wide areas, where the pressure isnot sufficient to produce flowing wells. PL X, B gives a vivid impression of the possibilities of such flow is through a 3-inch pipe a
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Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectwatersupply
