IN De 
A. 
Page. 
Adelaide shaft, features of------------------------- 178-179 
Alta Argent mine, description of- .-- 196-197 
Alta fault, age of ------------------- ------------------ 130 
Analyses, chemical--.-..-. -.-------------------------- 25-26, 
210, 213, 214, 215, 224, 225, 226, 288, 240, 242 
159 
Argentum-Juniata mine, features of----.---.------- 
Asheroft, mines at --------------------- 
Aspen, development of mines near--- 
discovery of ore deposits at---- 
XIX 
first shipment of ore from.----------------------- xx 
history of mining suits at -------.---------- XXI-XXV 
railroads to KXL 
situation of XVIL 
Aspen Contact mine, description of - 200-201 
Aspen fault, features of _----------------------------- 65-67 
Aspen mine, features of ----.----------- Ue narsaeare 155-157 
Aspen Mining and Drainage tunnel, features of-.-. 166 
Aspen Mining and Smelting Company’s mine, fea- 
(MEO —~ ee Seoeacieeenee ose meseessse Sa 157-158 
Aspen mining district, cause of uplift ine sees eae, 147-148 
description of sections shown on map of - . 137-143 
development of--...--------------------------- XX-XXI 
exploitation of __- XXVI-XXVII 
fault systems in -------------------~------------ 146-147 
features shown on map of ----------------~---- 132-150 
XXX-XXXI 
geological investigations in 
literature of nace 2O-OMGL 
litigation in -..------------------------------- XXI-XXV 
metals produced in ---:-~--.-.------------ XXVIII-XXIX 
mineralization in 146 
railroads in__--------------------------- XXI 
rate of faulting in-- 
résumé of structure in 
silver product of_.--------------------------.---. XXIX 
Aspen Mountain, description of -_-- - 151-167 
description of section of 
faulting on------------- = 
apy WONATS) Ol a oes esses sce es See XVII1, 56-74 
folding on----------------------------------------- 56-58 
résumé of structure of_----------- 
tunnels and shafts on west side of _-... -.-----. 160-161 
Aspen Mountain mining map, features shown on. 161-164 
Aspen special map, features shown on-------------- 54-84 
résumé of structure shown on -------..--. ------ 82-84 
B. 
Bagg, R. M., fossils identified by-- 
Baltic tunnel, features of---------- 
Bay State shaft, features of------------.---.--------- 168 
Benton shales, thickness of --------------------------- 
POSST] St tees ee ee eee 
Best Friend mine, features of --- 
probable history of rocks in 
MON XXXT 17 
Spricerooereeseas mao 202 
11, 207, 211 
Bimetallic tunnel, features of - 
IBISCHOPCHIS tava C1LOG Seen eerste aes 
Blue limestone, character, fossils,and age of ---.-.- 28-30 
Bob Ingersoll mine, features of--..-.---------------- 170-171 
Bonnybel fault, features of --- -.. 67-69 
Bonnybel mine, features of -------.-------------- . 151-153 
Brunton, D. W., acknowledgments to... XVI, XXII, 17, 22! 
quoted on present movement along fault 
PIBNeS her eee ae eee eee - 148-149 
Buckhorn No. 2 mine, features of------- ees 
Bushwhacker mine, description of ----..----------- 193-194 
Butte fault system, features of .--...-.--.---------- 98-100 
C. 
Calcium oxide in Leadville dolomite, occurrence of - 25 
Cambrian sediments, character of--.-.-------------- 49 
Camp Bird shaft, features of.-..-.---.------------- 172173 
Carboniferous formations, description of -- =... 22-37 
Castle Creek fault, features of ---------- 58-60, 89-93, 
Celeste shaft, features of -......------- ---- 174175 
Centennial tunnel, features of___.--.---------------- 205 
Chandler, C. F., analyses of water by--------------- 213 
Chemical analyses ._---.---------.---- 
210, 213, 234, 215, 224, 225, 238, 240, 242 
Chemical changes in ore since deposition --------- 236-242, 
Chemical geology, discussion of---.-.-------~------- 206-242 
Chert nodules and bands, occurrence of -_----------- 25 
Chloride fault, features of 
. Clark fault, features of----...------------ 
Colorado formation, character of. ...---------------- 41-42 
Contact fault) deseription) of 22-2 -s- 2-2-5 seen 74, 106 
Copper fault. features Of2 22-22-59 sesso ne ene 95-96 
Copperopolis tunnel, features of -- 166 
Cowenhoven tunnel, features of------.------ ------ 188-189 
Cretaceous rocks, description of_--.--------.--.---.. 4-43 
Cretaceous-Tertiary unconformity, description of.. 44-45 
Crisscross spar, figure of -- ee 228 
Gross;swihibmany ciied essa eeeese cee teen eee een eos Oe 
D. 
Dakota formation, character of .....----------------- 41 
IDEA) dlp ID Cheol os eas --- 1112526, 207 
Della fault, features of ___----__- 75, 130, 182, 186 
Della system of faults, features of. .-..-.---------- 146-147 
iDYeVllbey (SY, veabaKey BENE UN IS TMS, ie agains eee aseena=ns0 190 
features of -.-..-.-.---- -. 189-192 
nature of ores of See eee ol 192: 
occurnencelomorennes--esease= === sna -- 190-191 
Della S. Mining Company, litigation by---..-.--..-- XXIV 
Millers dt Ss icltedieecsesn rena = eee ena eee ee 27 
Diorite-porphyry, occurrence, character, and source 
OL ae are Seno oN Une soe Qos eeeerees sete O48 
Dixon shabty teauuresl Olas =a ses aeeee eae eee 1 
