ILLUSTRATIONS 



Page 



Plate 14 — Shimek 

 15 



Bluffs near Florence, Nebraska, and cut on Long bill. . 250 

 Section of Gilder mound and loess at Waverly, Iowa. . 251 

 IG " Loess ridge at Hamburg, Iowa, and bluff above Flor- 

 ence, Nebraska 252 



17 " Sections at Pries lake and Soutb Omaha 253 



18 — Brooks and Kindle : Lower end of Calico bluff, Yukon river. . . . 271 

 19 " " Upper end of Calico bluff, Yukon river. . . . 292 



20— FiSHEE : Giant springs near Great Falls, Montana 339 



21 — Darton : Geologic map of south-central Wyoming 403 



22 " Geologic map of part of central Wyoming 405 



23 " Columnar sections of central Wyoming 407 



24 " Tensleep sandstone 416 



25 " Caspar formation 419 



26 " Caspar formation, Red buttes, Wyoming 423 



27 " Members of the Chugwater formation 434 



28 " Sundance and associated formations, Wyoming 440 



29 " Cloverly conglomerate and Sundance and Morrison 



shales, Wyoming 447 



30 " Crowheart butte, and sandstone members of Colorado 



formation, Wyoming 451 



31— Wilson : Toronto island, 1793 476 



32 " Views illustrating shoreline studies 496 



33 — Stevenson : Portrait of James Merrill Safford 522 



34 — Gregory : Portrait of Angelo Heilprin 527 



35 — Mansfield : Glacial phenomena in the Crazy mountains 561 



36 . " Hanging valley of east fork of Rock creek, Montana. 562 



37 " Glacial phenomena in the Crazy mountains 563 



38 — Keyes : Deflative effects in the desert 571 



39 " Absence of foothills in desert ranges 572 



40 " Two destructive desert features 573 



41 " Contrasts of deflative erosion 574 



Figures 

 Sardeson : 



Figure 1 — Map showing the general relation of glacial lake Agassiz 

 and river Warren to the Minnesota and Mississippi 



rivers 30 



" 2 — Map of the Minnesota and Mississippi rivers near their 



confluence 32 



Keyes ; 



Figure 1 — Beveled rock-floor of the Jornada del Muerto, New 



Mexico 66 



2 — Beveled plains-surface of Cretacic sandstones 68 



3 — Geologic cross-section of the Vegas range, Nevada 68 



4 — Vertical Tertiary beds, near Daggett, California 69 



5 — ^Profile of Death Valley region, California 70 



6 — General conception of Basin Range structure 83 



7 — Profile of crest of Plomas range, Arizona 88 



