ILLUSTRATIONS 



Page. 



Plate I. San Anton Pass, Continental Divide Frontis 



piece 2 



Plate II. A Pine Park and Slope on Mt. Taylor 74 



Plate III. Pinon and Yellow Pine Association . ..78 



Plate IV. A Mountain Meadow in the Yellow Pine Associa- 

 tion 80 



Plate V. Scene in the Pinon Association, Mt. Taylor 82 



Plate VI. The Plain Below Acoma 90 



Plate VII. The Enchanted Mesa 94 



Plate VIII. Typical Mesa Vegetation 96 



Plate IX. Biotic Succession on Mt. Taylor 114 



Plate X. Wooded Slopes on Mt. Taylor 118 



Plate XI. Western Side of Puerco Valley, Showing- Vol- 

 canic Plug in Distance 122 



Plate XII. Cabezon, a Volcanic Plug of the Puerco Valley. . 123 



Plate XIII. The Backbone of North America 124 



Plate XIV. A High Point on the Continental Divide 125 



Plate XV. Jura-Trios Sandstone, Continental Divide . . ... 126 



Plate XVI. Earthquake Crack. Bluewater Valley 127 



Plate XVII. A Recent Lava Flow in the San Jose Valley 127 



Plate XVIII. Mouth of Bluewater Canyon ..... 128 



Plate XIX. Acoma Indian Pueblo V 130 



Plate XX. A Thunderstorm Over Mt. Taylor 132 



Plate XXI. Looking into the Crater of Mt. Taylor 134 



Plate XXII. A Pine Park on Mt. Taylor 135 



Plate XXIII. A Canyon on the Slope of Mt. Taylor 135 



Plate XXIV. The Continental Divide Looking West, showing 



Grass and Timber of Chivote Mesa 136 



Plate XXV. Gonzales on the Continental Divide, From the 



East 138 



Plate XXVI. A sheer rock wall along the Continental Divide. 139 

 Plate XXVII. Carbonaceous Shale, Seven Lakes Oil Region... 140 

 Plate XXVIII. Aridity and Wind Erosion, Continental Divide. 140 

 Plate XXIX. Example of Wind Erosion on the Continental 



Divide 141 



Plate XXX. Seven Lakes Oil District. . 142 



