INDEX. 501 



Grand Eiver, Archseau rocks of 107 



Calciferous rocks of 113 



Carboniferous rocks of 116 



Dakota group of 130 



Jurassic rocks of 125 



Middle Cretaceous of 135 



Permian rocks of 120 



Primordial rocks of Ill 



rate of fall of 432 



Granite 66,68 



of quartzites 189 



town of 51 



Great Amphitheatre 206 



Plateau „ 420 



Green Mountain lode 234 



Eiver group 140, 147, 156, 159 



Gunnison cattle-camp 95 



Canon 97, 425 



Capt. J. W 415 



City 95,425 



Eiver 94,161 



Archfean rocks of 107 



Dakota group of 130 



Jurassic rocks of „ 126 



LakeForkof 94 



Middle Cretaceous of 135 



North Fork of 93,94,98,101,427 



rate of fall of 433 



Smith's Fork of 94,97 



Valley 423 



Gypsiferous beds on Eagle Eiver 83, 119 



Grand Eiver 120 



Gypsum 178 



H. 



Hall, Prof. James ,. 276,278 



Handie'sPeak 190,204,460 



Haydeu, F. V 100,117,121,126,145,150,178,285 



letter to the Secretary of the Interior 1 



on Jurassic 124 



Potsdam sandstone Ill 



report of 19 



Highland Mary lode 233 



Higley's mine 34, 38 



Holmes, W.H 7,48,100,126,178 



report of 59 



Holy Cross Mountain 54, 55 



Hopkins mine 33 



Hovenweep Valley, ruins in '. 381 



Howardville 465 



I. 



Ingersoll, Ernest, letter to Dr. Hayden , 385 



report of 383 



Inscriptions near cliff-houses = 375 



Introduction to report of A. C. Peale 77 



T. M. Endlich 185 



Intmsion of volcanic rocks 219 



Italian Peak 418 



J. 



Jackson, W.H 11 



on ancient ruins in Southwestern Colorado 369 



rejior t of 367 



Junction Creek 221 



Jurassic flora '. 283 



group 44, 124 



in Elk Mountains 57 



rocks 60,70,97,105 



sections of 61, 125, 126, 127 



