TNDEX. 
87 
Page. 
Fossils, occurrence of 33, 34, 38, 17, 50, 55, 56 
Franklin Creek, location and character of.. 44-45 
gold on 39, II 15 
production of 45 
rocks on 51 
settlement on 44 
Freighting, cost of 10-11 , 69-70, 77, 8 1 , 83 
Fuel, scarcity and cost of 63, 81, 83 
Gabbro, character and occurrence of 37 
( lame, occurrence of 16, 17 
Geography of region, account of 9, 17-23 
Geologic party, itinerary and work of 14-16 
Geological Survey, prospects found by .... . 73-74 
work of 1 3-17, 67 
Geology of region, sketch of 23-38 
summary of 37-38 
Gerdine, T. G., work in charge of 14 
Gilmore Creek, rocks on 73 
village on 71 
Glacier Mountains, location and character 
of 18,30 
rocks of and near 33-34, 36, 56 
view of , 10 
Glenn Creek country, location of 11 
study of 13 
Gneiss, occurrence of 73 
Gold, concentration of 65-66 
distribution of 65-66, 74 
Page. 
[independence Creek, location and course 
of 61,63 
population on . . 
Irene Gulch, fossils 
gold on 
location of 
J. 
Juglans nigella, occurren 
Kenai formation, character of 25, •>!, 32-34 
deposition of 37 
■ iccurrence of 25, 32-34, 58 
Ketchum Creek, rocks on <;o 
King Solomon Creeks, rocks near 31-32 
Kink, the, cut-off at, view of 50 
location and character of 51-52 
work at. preparation for 
Knowlton, F. H., fossils determined l> 
Kotlo series, equivalents of 
Koyukuk, steamer, characteristics of . 
Lost Chicken Creek, dump on, view of. 
gold on 
location of 
M. 
McConnell, R. G., on Yukon "granite". 
source of 41, 43, 48-49, 56, 58, 65, 83-84 Machinery, use of 
Gold-bearing iocks, character of 26, 28, 30 
Gold in place, occurrence of 48-49, 58 
Gold-mining, methods of 41 
Gold placers of region, account of 39-84 
Gold Stream, course and character of 70-71 
developments on 75, 77 
gold on 67 
Goodrich, H. B., on Davis and Poker creeks 42 
on Franklin Creek 44 
work of 13 
Government trail to Fortymile, route of ... 10 
Granite, occurrence and character of . . . 23-24, 36 
Granite Creek, location of 20 
rocks on 32 
Grass, occurrence of 12-13, 71-73, 83 
Gravels, thickness and character of 43,44, 
47, 50, 53, 54, 55, 56, 60, 75, 77, 79-80, 81-82 
Gravels, bench, character and occurrence 
of 34-35,56 
Gravels, stream, occurrence of 35 
Ground, value of 40, 
43, 45, 47-48, 50, 60, 62, 64-65, 75, 77-78 
H. 
Hematite, occurrence of 41 
Hess, F. L., work of 15, 67 
Hot rocks for thawing, use of 
Hot water for thawing, use of 
Humbug Pup, gold on 
Hutchinson Creek, conditions on 
Hydraulic plant, view of 
Hydraulic power, use of 
78-82 
82 
52 
51-52 
54 
41 
I. 
Igneous rocks, character of 27, 35-37 
occurrence of 23, 30, 35-37 
Mammoth Creek, location of, and condi- 
tions on 61-62 
Map of Alaska 9 
of Birch Creek region 60 
of Fairbanks region 60 
of Fortymile quadrangle 34 
of Yukon-Tanana region Pocket. 
Map, geologic, of Yukon-Tanana area 22 
authors of 25-26 
Mastodon Creek, developments on 62 
location of 61 
origin, course, and character of 62 
rocks on and near 28, 62 
open cuts on, views of 62 
Mastodon Dome, location and altitude of.. 21 
Mastodon Fork, location of, and conditions 
on 64 
Metamorphic rocks, character and occur- 
rence of 24,26-35 
gold in 26 
origin of 24 
Miller Creek, character and course of 63-64 
gold on 53 
location of 61 
origin and course of 53 
population and production on 64 
rocks on 64 
Miller Fork, location of, and conditions on. 64 
Miller House, location of 11 
Mining, cost of 42, 81, 84 
Miocene, Arctic, fossils of 
occurrence of 
Mission Creek, course and character of 
fossils on 
gravels on 
38 
34 
19-20 
38 
35 
rocks on 31 , 33, 34 
