ILLUSTRATIONS XV 



Page 

 Bretz 



Figure 1 — Glacial drainage features of east-central Washington . . 574 

 " 2 — Steptoe Butte and the maturely dissected Palouse region 



east of the "Scablands" 577 



" * 3 — Channeled "Scabland" of Spokane age 578 



" 4 — Spokane drainage channels in mid-length of Moses 



Coulee 578 



" 5 — Rock Lake, in a glacial drainage channel of Spokane age 579 



" 6 — Glacial ice and drainage near Spangle, Washington..., 582 



" 7 — Post-Spokane talus in "The Potholes" south of Trinidad 591 



" 8 — Part of Drumheller Channels plexus 596 



9— "The Potholes'' near Trinidad, Washington 598 



10— One of "The Potholes" 599 



11— Cliffs of lower Moses Coulee 602 



12— Steamboat rock 604 



Kindle : 



Figure 1 — Generalized Ottawa Pleistocene section 622 



" 2 — Sketch showing two levels of clay pits southwest of 



Billings Bridge 628 



" 3 — Calcareous root concretions exposed by wind erosion . . . 630 

 " 4 — Sketch at Rideau Junction, Ontario 632 



QUIRKE : 



Figure 1 — Theoretical parallel folding 650 



" 2 — Ideal boudinages 651 



" 3 — Boudinage, Carriere de la Citadelle, Bastogne, Belgium. 652 



" 4 — ^Boudinage, Bastogne, Belgium 653 



" 5 — Formation of a boudin by lateral pressure — a rotational 



strain 656 



" 6 — Recovery, clastic or otherwise, of a boudin, after release 



of lateral pressure 656 



" 7 — Boudin-like features due to drag-folding and cross-frac- 

 tures 657 



8— Boudins 658 



" 9 — Phacoidal structure and boudins bounded by schistose 



rock 658 



Taber: 



Figure 1 — Principal faults on the San Francisco peninsula 665 



Miller : 



Figure 1 — Map of North America 680 



Lane : 



Figure 1 — Differences from deepest gradient in Michigan 705 



" 2 — Temperatures in Michigan 705 



" 3 — Temperatures in Lake well, West Virginia 705 



(12 plates; 125 figures.) 



