Geology and Underground Waters of South Dakota

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...20-42 Gray clay................................................... 42-75 Black clay, gravelly......................................... 75-90 Chalk rock.................................................. 90-130 Yellow sandstone, hard....................................... 130-155 Blue shale................................................... 155-195 Gray shale.................................................. 195-350 Yellow lime rock............................................. 350-380 Shale and lime............................................... 380-415 Sand and shale............................................ 415-445 Feet. Lime rock................................................... 445-451 Sandy mud.................................................. 451-456 Lime rock, shale, and marl.................................... 456-476 Sand rock, with shale streaks............................... 476-510 Red shale and quartzite..................................... 510-518 Gray sand rock; 80-gallon flow; 1-foot layer of pyrites at base.. 518-558 Sand rock, pinkish.......................................... 558-589 Calcareous sand rock,.............. 589-601 Quartzite, pink, with calcareous beds.......... 601-674 Sioux quartzite............................................. 674-680 This record is probably more accurate than some others which have been published, in indicating a thickness of 120 feet of chalk under the drift.. BROOKINGS COUNTY. ' Brookings County is in the drainage basin of Big Sioux River, on the east coteau, and ranges in altitude from about 1,600 to 1,800 feet. The region is heavily mantled by glacial drift and underlain by a considerable thickness of Pierre shale. To the south and east the Sioux quartzite appears to rise rapidly, and probably the Dako...