SCIENTIFIC INDEX. 



Aboriginal mounds. 8ee Mounds. 

 Absorption of atmospheric moisture and of 



water by building stones, 185, ISO. 

 Acervularia, 357 f. n. 



Acid fumes, action on building stones, 180. 

 Agassiz, lake, 101, 408, 412, 461, 484, 581, 6122, 



623. 



Alkali, 524, 610, 620. 

 Alkaline soils, 128, 129, 524, 610. 

 Alkaline waters, 136, 512, 524, 554, 610, 620. 

 Alluvial terraces. See Terraces. 

 Alluvium, 264, 445, 451, 464, 467, 527, 583, 612, 



624, 643, 662. 



Altamont ( first) moraine, 505, 520, 528, 602, 64 1 . 

 Altitudes. See Elevations. 

 Arnbocojlia, 360. 



Ammonites, 577; A. placenta, 600. 

 Amphibole, 38. 

 Analyses: alkali, 524 f. n. 



Building stones, 195203. 



Cretaceous clays, 438. 



Dolomites, 154-5. 



Galena limestone, Lime City, 299. 



Hydraulic cement and limestone, 449. 



Lignite, 578; lignite ashes, 579. 



Peat, 469, 514, 532, 047; peat ashes, 516. 



1'ipestone (catlinite), 542. 



Shakopee limestone, 450, 638. 



Water of Heron lake, 512. 

 of spring near Minnesota City, 264. 

 of Owatonna mineral springs, 402. 

 of Rock river, 550. 

 Andromeda 1'arlatorii, 574. 

 Antelope, 80. 

 Antelope( third )moraine, 478, 509, 581 , 593, 605, 



017, 021, 624, 641. 

 Antelope valley, 593, 605, 616, 621. 

 Arcluuan system, 568, 596. 

 Archeology, 489, 555561, 647, 673. See 



J/oim<fo and Ineeriptiona. 

 Argillyte, 82, 58. 

 Artesian wells, 389, 398, 422, 424, 452, 470. 



Also see Flowiwj wMs. 

 Asbestus, 669. 



Atrypa, 78, 305, 307, 358. 



aspera, 300. 



reticularis, 301, 304, 307, :J60. 

 Aulopora, 360. 

 Austin rock, 359. 

 Aviculopecten, 360. 



Baculites, 584, 585, 599, 600, 608. 



ovatus, 600. 

 Balsam fir, 139. 

 Banksian pine, 139. 

 Bass and elm in Big Woods, 636, 65 !. 

 Bear, 30. 



Bear lake prairie, 386. 

 Beaver, 23, 29. 

 Bellerophon bilobatus, 78. 

 Berea sandstone for building, 183. 

 Big Stone and Lac qui 1'arle counties, chapter 

 011, 613. 



Situation and area, 613. 

 Surface features, 614. 



Natural drainage, 614. 



Topography, 614. 



Elevations, 615. 



Soil and timber, 617. 

 Geological structure, 617. 



Granite and gneiss, 617. 



Cretaceous shale, 619. 



Glacial and modified drift, 619. 



Coteau des I'rairies, 021. 



Antelope valley and moraine, 621 . 



Fourth or Kiester moraine, 621. 



Later moraines, 621. 



Glacial lake in basin of Minnesota river, 

 622. 



River Warren, 622. 



Modilied drift and alluvium, 624. 



Terraces, 625. 



Modified drift of earlier glacial epoch, 625. 



Buried moraine, 626. 



Red till, 627. 



Wells, 629. 



Material resources, 630. 



Water-powers, 630. 



