vI ILLUSTRATIONS 
Page 
Fiaure 10. Section through House Mountain, Tex 89 
1 section showing lithologic variations in the Permian of Glass 
Mountains, Tex 94 
12. Section southeast of Dugout oan, Tex 95 
13. Section of Altuda Mountain, Tex 95 
14. Section across Alpine Basin north of Alpine, Tex 96 
15. Profile of northern part of Tierra Vieja Mountains, Tex___-- 102 
16. Section across Van Horn Mountains, Tex 103 
17. Map showing route from Lobo, Tex., to Carlsbad Caverns, 
N. Mex 104 
18. Section of east front of Sierra Diablo at Victorio Peak, Tex-.-- 107 
19. Section across Sierra Diablo and Baylor Mountains, Tex-___- 108 
20. Sections across Guadalupe Mountains at El Capitan, ae and 
Carlsbad Caverns, N. Mex 109 
21. Section across western part of Wylie ape {30 ee 110 
22. Section from Diablo Plateau to Eagle Fl ex 115 
23. Section from Quitman Mountains to ber piace ee 117 
24. Section across Malone Mountains, Tex 118 
25. Section through south end of Hueco Mountains, Tex_______- 121 
26. Section across Franklin Mountains, Tex 127 
27. Section west of El Paso, Tex 134 
28. Cross section of Kilbourne Hole, west of Lanark, N. Mex.___ 134 
29. Section through Goodsight Peak, N. Mex 136 
30. Sections across Florida Mountains, N. Mex 139 . 
31. Sections across Little Florida Mountains, N. Mex 140 
32. Section across Fluorite Ridge, N. Mex 141 
33. Sections across Cooks Range, N. Mex 142 
34. Sections across Victorio Mountains, N. Mex 144 
35. Map showing Gadsden Purchase 151 
36. Section of Dos Cabezas Mountains, Ariz 155 
37. Sections across n Mountains, Ariz 158 
38. Section through Johnson mining district, Ari 159 
39. Section across northwest end of Whetstone iadatainn. Aris. 162 
40. Section through Bowen siding, N. Mex 163 
41. Section across Tres Hermanas Mountains, N. Mex 165 
42. Section across north end of Hatchet Mountains, = Mex... 467 
43. Section of Chitication Mountains near Portal, A 170 
44. Section a t of Chiricahua, Avis. o': 37% 
45. Section across Bis bee region, Ariz 176 
46. Section north of Helvetia iting camp, Ariz 182 
47. Geologie map and sections east of Vail, Ariz 184 
48. Section at Picacho de la Calera, northwest of ee Ariz-. 192 
49. Section of west side of Tucson Mountains, Ari 193 
50. Section through Tempe Butte and Tempe Well, Artec: es 203 
51. Map showing route of Apache Trail, Ariz 209 
52. anon across Hayes Mountain, southwest of Saa Carlos, 
Sota reat se eaten a 211 
53. aver of region near Globe, Ariz 212 
54. Outline geologic map of etna region, Ariz 212 
55. Section northwest of Miami, Ar 213 
56. Section through Sierra Ancha, jes 214 
57. — at Roosevel elt Dam, Ariz 215 
58, Section t of Roosevelt Dam, Ariz 216 : 
