ILLUSTRATIONS 



XI 



Keyes ; 



Blackwelder : ^^s^ 



Figure 6— Diagrammatic structure section of the Wasatch range in 



Ogden Canyon 536 



" 7— Diagram of the geology and structure within the scope of 



figure 2, plate 39 537 



" 8— Diagram of overthrust shown in figure 2, plate 40 538 



*' 9— Sketch map of part of Huntsville basin and adjacent Bear 



River plateau 540 



Figure 1 — Cross-section of the Humboldt range 550 



" 2 — Geologic cross-section of the White Pine range 551 



" 3 — Apparent folding of tertiary beds of the Funeral range 551 



«< 4— Tilted tertiaries of the Grapevine range 552 



" 5 — Ancient structures of the Vegas range 552 



" 6 — Ancient syncline of the Spring Mountain range 553 



" 7 — Old arch and trough of Great range 553 



" 8— Faulted arch in Hot Creek range 554 



'* 9 — Ancient and recent tectonics of Humboldt range 554 



*' 10 — Geologic cross-section of the Sandia range 557 



" 11 — Structure of the north end of Mexican tableland 557 



" 12— Old and young tectonics of Caballos range 557 



" 13— Thrust plane of Caballos range 558 



" 14— Ancient tectonics of Chupadera mesa, New Mexico 558 



" 15 — Apparent Basin-range structure in the Mexican tableland, . . 560 



16— Stages of development of Desert ranges 561 



Keyes : 



Figure 1— Geographic provinces of arid United States and Northern 



Mexico 566 



" 2 — Profile of the Rio Grande Valley at Socorro (distance 40 



miles) !^ 578 



' ' 3 — Highland planes of the Rio Grande 579 



' * 4— Relationship of Rio Grande Valley terraces 579 



" 5 — Geologic cross-section of the Mesa de Maya, New ^Mexico. . . 594 

 '* 6 — Profile of arid physiographic stages 596 



Johnson : 



Figure 



Wright : 



Figure 



Reid 



Figure 



1 — Diagram illustrating the formation of beach cusps 602 



2— Diagram illustrating the formation of cusps 603 



3 — Variations in the form of beach cusps 605 



4— Partially eroded older cusps and respaced later series 606 



5 — Beach cusps (after Jefi"erson) showing compound cusps 608 



6 — Normal and inverted beach cusps 612 



1 — Diagrammatic section through a mountainous area at the be- 

 ginning of the ice-flood period 724 



2— Diagrammatic section through the same area 724 



1 — Combination of finite rotations. 738 



2 — Combination of finite rotations 738 



Taylor : 



Figure 



1 — Map showing Richmond train and distribution of Great Bar- 

 rington bowlders 



(54 plates ; 109 figures. ) 



'48 



