ILLUSTRATIONS 
PiaTE 25. A, ees plain, western Arizona; B, Pictographs near Sacaton, 
26. A, “Dries = ee River Valley, Ariz.; B, Cotton field, Salt 
River 
27. A, stad of "Salt River Valley, Ariz.; B, Irrigating in Salt 
River Valley 
28. A, Cliff bets S isag National Monument, Ariz.; B, 
Roosevelt Dam, A 
29. A, Encampment of jee Indians; B, View across Canyon 
ke, Ariz 
30. Canyon of Fish Creek, Ariz 
31. A, Blossoms of prickly pear cactus; B, Superstition Moun- 
tain, Ariz 
32. A, Montezuma Face, near Hyder, Ariz.; B, Northern part of 
ohawk Mountains, Ariz 
33. A, The Explorer, of the Ives expedition; B, Gila River from 
Antelope Hill, Ariz 
34. A, Part of Yuma, Ariz.; B, Irrigated district near Yuma_-_-_-_- 
35. Map of the Colorado River delta region, below Yuma, Ariz_- 
36. A, Drifting sands near Amos, Calif.; B, Salton Sea, Calif __-- 
37. A, _ Trrigating date palms, Imperial Valley, Calif.; B, Cotton 
mperial Valley 
38. A, Mud voleanoes eae apy of Niland, Calif.; B, Travertine of 
Lake Cahuilla, C 
39. A, B, San Andreas ca northwest of Indio, Calif 
40. A, ee pgs east of Mecca, Calif.; B, Tilted late Ter- 
beds in Indio Hills, Calif 
41. A, ‘Ocotillo and cholla, Coachella Valley, Calif.; B, Washing- 
ton palms in Palm Canyon, Calif 
42. A, San mages A jatar Calif.; B, Orange trees in fruit, 
Redlands, C 
43. View up San visi Valley, Calif 
44, A, San Bernardino Peak from point near Redlands, Calif.; B, 
Magnolia Avenue, Riverside, Calif 
45. A, Picking lemons near Riverside, Calif.; B, Orange groves 
near Riverside 
46. A, The great arrow-shaped scar near Arrowhead Springs, 
Calif.; B, Bitcreed strata in Palen Phi CO sce t ie 
47. Los Aeeeien Plain, Calif 
48. A, Shore of the Pacific Ocean at Santa Monica, Calif.; B, 
pins pits at La Brea, Calif 
49. Carrizo Gorge, Calif 
Ficure 1. Hypothetical section of salt dome at Avery Island, La 
. Section across dome near Sulphur, 
3. Section through Spindletop salt dome, Tex 
4. Section through Columbus and oi Tex 
5. Section across Salt Flat oil field, T 
6. Diagram = changes in ERE Spofford to San 
Antonio, 
7. Sketch ae from Turkey Mountain through Anacacho 
Mountain, Tex 
8. Section at Langtry, Tex 
9. Section near Maxon. Tex 
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