INDEX. 307 



Page. 



Unconformity of Tertiary and Cretaceous 11, 57, 280, 281 , 288 



Uplifting at centers of erosion ?..*•.'. 18, 20 



of Plateau Province 15, 18 



Vermilion Cliffs (see also Triassic) 148 



Virgin River, canons of. , 209 



Volcanic conglomerates 39,70,75,178,190,214,237,238,244,275,295 



Volcanic eruptions, causes of (Chap. V) 113 



Wasatch monocline 160, 257 



Wasatch Mountains 2 



Wasatch Plateau, general discussion of (Chap. VII) 160 



Relations to Plateau Province 4,19 



Water-Pocket fold 44,280,286,287 



West Gunnison fault 164 



West Kaib ah fault... 32 



Zirkel, F. , augitic andesites 65 



Propylites 108 



Ekyolites .' 104 



Zone of diverse displacement 162 



