CONTENTS. XXIX 



OHAPTEE XI. 



Page. 

 Sevier axd PaunsXgunt Plateaus ^^ 



General structure and fonu of the Sevier Plateau.— Monroe Amphitlieater.— Eastern side of the 

 Plateau and Blue Mountain.— Northern lava floods.— The central portions of the plateau and 

 their eruptive masses.- Volcanic conglomerates.- Southern eruptive center of the plateau.— 

 East Fork Canon.- Its tufas.— Their metamorphism.— Grass Valley, its structure and ori- 

 gin.— Alluvial cones and tufas of Grass Valley.— The Paunsilgunt.— Lower Eocene beds.— 

 The southern terraces.— Scenery of Pilria Amphitheater and Pink CUfls.— Basaltic cones. 

 225-255. 



CHAPTER XII. 



The Fish Lake Plateau.— The Awapa.— Thousand Lake Mountain 257 



Southern extension of the Wasatch Monocline.— Grass Valley faults.-Summit Valley.— Fish Lake 

 Plateau and the grand gorge.— Fish Lake.— Terminal moraines. - Succession of volcamo 

 beds.— Slount Terrill and Mount Marvine.— Tertiary formations.— Origin of Summit Valley.— 

 Moraine Valley.— Mount Hilgard and its rocks.— The Awapa Plateau.— Trachytes and con- 

 glomerates.— Ancient basalt fields.— Rabbit Valley and its alluvial beds.— Tertiary strata.— 

 Thousand Lake Mountain.— Jura and Trias.— The Eed Gate. 256-283. 



CHAPTER XIII. 



The Aquarius Plateau . 



284 



Distant views and the approach to the Aquarius.— Its grandeur.- Panorama from its south- 

 eastern salient.-The Water Pocket Fold.— Inconseqiient drainage.-The canons of the Esca- 

 lante.— The great Kaiparowits Cliff.-Circle Cliffs.— Navajo Mountain.-Potato Valley.— Pre- 

 Tertiary flexures and erosion.— Central faults of the Aquarius.— Its lava cap.— Western waU 

 of the Plateau.— Table Cliff.— Kaiparowits Peak. 284-298. 



