SCIENTIFIC INDEX. 



695 



Redwood, 568; Coteau lakes, Dakota, 596; 

 Big Stone lake, 617; Le Sueur county, 636; 

 . Bice, 653. 



Silieifled wood, 643, 669. 

 Silurian rocks at St. Anthony falls, 83. 



See Lower and Upper Silurian. 

 Silver, 52 f . n. 



Sink-holes, 209, 252, 275, 326, 333, 341. 

 Sioux Falls branch, Chicago, St. Paul, Minne- 

 apolis & Omaha railway, elevations, 536. 

 Sioux quartzyte, 537. 

 Slate, 32, 56, 103; talcose, 75. 

 Slickeusides, 571. 

 Sloughs, 524, 564, 595. 

 Snow-fall in glacial period, 641. 

 Soils and subsoils, 63, 69, 125-9; soil of Hous- 

 ton county, 213; Winona,245; Fillmore, 277; 

 Olmsted, 345; Mower, 350; Dodge, 374; 

 Freeborn, 380; Steele, 396; Waseca, 409; 

 Blue Earth, 420; Faribault, 456; Watonwan 

 and Martin, 475; Cottonwood and Jackson, 

 497; Murray and Nobles, 523; Pipestone and 

 Rock, 537; Brown and Redwood, 567; Yel- 

 low Medicine, Lyon and Lincoln, 595; Big 

 Stone and Lac qui Parle, 617; Le Sueur, 636; 

 Rice, 652. 

 Sorghum, 672. 



Southern Minnesota division, Chicago, Mil- 

 waukee & St. Paul railway, elevations, 211, 

 277, 349, 455, 474, 496, 522, 536; Mankato 

 branch, 419. 



Specific gravity of building stones, 185, 195-203. 

 Specimens in duplicate ordered, 109. 

 Spirifer, 301,339. 



Springs, 71 f . n., 264, 274, 275, 286, 326, 333, 

 357, 402,414, 465, 488,515,532,550,586,590, 

 595,610,611,620,645. 

 Spruce, 139. 

 Stalactites, 341. 



Standard Cement company, 434, 449. 

 State buildings, 193. 

 Staurolite, 43. 

 Steaschist, 76, 77. 

 Steele county, chapter on, 394. 

 Situation and area, 394. 

 Surface features, 394. 

 Natural drainage, 394. 

 Water-power, 394. 

 Topography, 395. 

 Townships described, 395. 

 Elevations, 396. 

 Soil and timber, 396. 

 List of trees and shrubs, 397. 

 Geological structure, 397. 

 Trenton period, 397, 899. 

 Cretaceous, 398, 399. 



Owatonna well, 398. 



Glacial drift, 399. 



Terminal moraines, 400. 



Wells, 401. 



Mineral springs, 402. 



Pottery and brick, 402. 



Aboriginal mounds, 403. 

 Steriocisnia, 78. 



Stone buildings in Saint Paul, 191; in Minne- 

 apolis, 192. 



Stone City limestone, 183. 

 Stone hammers in mounds, 673. 

 Storks, 21. 



Straparollus Minnesotensis, 431. 

 Striae. See Glacial strice. 

 Stromatoporoid corals, 357. 

 Strophomena, 78, 292, 293, 297, 300, 361, 655. 

 alternata, 78,291, 301, 307. 

 fluctuosa, 301, 307. 



Subsidence, 99, 101 . [276, 326, 453, 586. 



Subterranean streams, 71 f. n., 208, 237, 242, 

 Sucker, 78. 



Sulphuret of copper, Huronian, 100. 

 Sulphuret of lead, 32, 33, 259. 

 Swans, 21. 

 Syenite, 33, 142-9, 569, 596-7. 



Table of qualities of building stones, 184, 195- 



Taconic controversy, 84. [203. 



Tamarack, 139. 



Terminal moraines. See Moraines. 



Terraces of modified drift, 118, 227, 261, 313, 

 317,364, 386, 445,496,510,545,564,581, 583, 

 607, 642, 643, 662-5. 

 of rock strata, 270-4, 418, 625, 636, 665. 

 of till, 607, 625, 626. 



Thickness of the ice-sheet, 484, 549 . 

 of drift. See Drift. 



Thousand-foot contour-line, 123. 



Tiles for drains, 452. 



Till (see Drift], 117, 126, 440; Fillmore county, 

 311; Olmsted, 343; Mower, 362; Dodge, 374; 

 Freeborn, 385; Steele, 399; Waseca, 413; 

 Blue Earth, 439-442; Faribault, 460; Waton- 

 wan and Martin, 478; Cottonwood and Jack- 

 son, 505; Murray and Nobles, 526; Pipestone 

 and Rock, 543; Brown and Redwood, 580; 

 Yellow Medicine, Lyon and Lincoln, 601; 

 Big Stone and Lac qui Parle, 620; Le Sueur, 

 639; Rice, 658. 



Till, blue in western Minnesota, 126,440, 627-8. 

 changed by weathering to yellow next to 



surface, 440, 582, 625. 



contained in the ice-sheet, 440, 602, 604. 626, 

 and exposed on it by melting, 604, 610, 662, 

 665. 668. 



