690 



THE GEOLOGY OF MINNESOTA. 



Elevations, 634. 



Soil and timber, 636. 

 Geological structure, 636. [636. 



Jordan sandstone and Shakopee limestone, 



Cretaceous clay, 639. 



Glacial and modified drift, 639. 



Terminal moraines, 640. 



Terraces of modified drift, 642. 



Alluvium, 643. 



Boulders, 643. 



Lake-ridges, 643. 



Copper found, 643. 



Wells, 643. 

 Material resources, 645. 



Water-powers, 646. 



Building stone, 646. 



Lime, 646. 



Bricks, 646. 



Peat, 647. 



Aboriginal earthworks, 647. 

 Le Sueur prairie, 634, 642. [577-9. 



Lignite, exploration for, 98, 363, 384, 573, 

 in Cretaceous strata, 73, 84, 96, 98, 383, 398, 



568, 572, 577 9, 599, 620. 

 in drift, 84, 363, 383, 413, 435, 443-4, 465, 486, 



510, 511,529, 553, 584-5, 608, 620, 629, 643, 



644,671. 



mined in Dakota, 578, 620. 

 Lime: Houston county, 234; Winona, 265; 

 Fillmore, 319; Olmsted, 335; Mower, 366; 

 Dodge, 372, 375; Freeborn,391; Waseca,413; 

 Blue Earth, 448; Jackson, 513; Murray and 

 Nobles, 531; Brown and Redwood, 587; Yel- 

 low Medicine, Lyon and Lincoln, 611; Big 

 Stone and Lac qui Parle, 630; Le Sueur, 646; 

 Kice, 672. 



Limestone at lake of the Woods, 42; at Saint 

 Anthony falls, 33, 35, 58, 85; in the Minne- 

 sota valley, 36, 59, 85, 98, 575-6. 

 See St. Lawrence, Shakopee, Trenton, Oalena, 



Hudson River, Niagara and Devonian 



formations. 



Limestone boulders and pebbles in the drift, 

 383, 464, 485, 509-10, 531,543, 553, 595, 606, 

 611, 620, 631, 640, 643,646,659, 663; derived 

 in part from the vicinity of Winnipeg, Man- 

 itoba, 509, 553, 620, 643. 

 Limestones, as building stones, 158, 163, 170. 

 Lincoln county, chapter, 589. See Yellow Med- 

 icine county for contents of chapter. 

 Liugula, 83, 258, 429 f. n , 637. 

 Cobourgensis, 292, 298. 

 Dacotaensis, 637, 638. 

 Elderi, 291,298, 343. 

 quadrata, 298. 

 Lingulepis, 288 . 



Liriodendron Meekii, 576. 



Lithology of rocks in the Minnesota valley, 38. 

 of the building stones of the state, 142-190. 



Lituites undatus, 655. 



Loam, 117, 119,128,209,239,245,246,263,278, 

 315-317,365, 392, 543, 544, 659, 661. 



Lobes of the ice-sheet, 406,463,479,481,484,640 



Locust, Rocky Mountain, 498. 



Lodestone, 344. [543-5. 



Loess, 118, 119, 213, 245, 260, 262, 278,526, 



Lower Magnesiau limestone, 83, 85, 98, 102. 

 See St. Lawi-ence and Shakopee limestones. 



Lower Magnesian series, 422, 500. 



Lower Silurian formations: Houston county, 

 218; Winona, 250; Fillmore, 289-301; Olm- 

 sted, 339-343; Mower, 362; Dodge, 370-4; 

 Steele, 397; Rice, 655. 



Lower Trenton limestone, 85, 102; section at 

 Minneapolis, 168: as building stone, 170-6; 

 Houston county, 218; Winona, 250; Fill- 

 more, 289-292; Olmsted, 343; Dodge, 370; 

 Steele, 399; Rice, 655. 



Lumber, 421, 672. 



Lyon county, chapter, 589. See Yellow Medi- 

 cine county for contents of chapter. 



Maclurea, 300; M. Bigsbyi, 340. 



Magnesian lime, character of, 157, 448. 



Magnesian limestone. See Dolomites and 

 Limestone. 



Magnetic variation, 378, 396, 547 f. n. 



Magnetite, 96, 103. 



Magnolia alternans, 574. 



Maples, 653. 



Maps: by Allen, 52; Beltrami, 45; Carver, 24 

 f. n.; DeL'Isle, 20; Franquelin, 66; Henne- 

 pin,8; Joliet, 110; Lea,66;Nicollet, 67; Och- 

 agach, 18; Owen, 82 f. n.; Schoolcraft, 52; 

 Warren, 100. 



Maquoketa shales, 84, 300. 



Marble, 357, 366, 672. 



Marcellus formation, 360. 



Marl and marly soils, 129. 



Marshes, 364, 393, 394, 395, 524, 564, 649, 660. 



Martin county, Watonwan and, chapter on, 

 472. See Watonwan cnunty for contents of 

 chapter. 



Mashkilonge, 78. 



Mastodon tusk, 670. 



Medial moraines. See Moraines. 



Mergus cucullatus, 37. 



Mesabi range, 119-121, 123, 125, 130. 



Metamorphic rocks. See Eozoic system. 



Metamorphism of rocks north of lake Supe- 

 rior, 84-5. 



Meteorology, 95. See Climatic clianyes. 



