INDEX 
Page. 
A. 
Aa, Dana's description of 91 
Aa near Cinder Buttes, occurrence and 
characteristics of 97-98 
Agriculture in the region 28-31 
Alcoves on sides of canyons, occurrence 
and features of 127-130 
production of, conditions necessary 
for 129-130 
Alkaline salts, depth of bed of 70 
Alkaline soil, indications of 141 
Alluvial deposits, flowing wells in, possi- 
bility of obtaining 181-183 
Alluvial soils, deposition of _ . 135-136 
American Falls, height of 28 
Analyses of soils 136, 137 
Arco, lava cone near, plate showing 112 
Area of the region 14 
Arid regions, springs in, occurrence of . _ _ 155 
Artesian basin, conditions favoring pro- 
duction of . . 157 
section of 157 
structure of, illustration of 156-157 
Artesian slope, section of . _• 158 
Artesian wedge, section of 157 
Artesian wells, flow of, methods of 157-158 
imperfect casing of, results of... 178 
location and features of 174-177 
probable successful location of ... 1 79 
temperature of 154 
unsuccessful location of _ 177-178 
Ascension Island, vesicular bomb from, 
reference to drawing of 77 
B. 
Bancroft, W. H., information furnished 
by --. 173 
Basalt near Cleft, fault scarp of, plate 
showing 126 
Basin, artesian, section of 157 
Beaver River, features of 130 
Bennett Spring, features of 171 
Big Butte, composition of 35, 45 
elevation of 34 
location and features of 16, 34-38 
plate showing 34 
slopes of, character of 34-35 
Snake River lava near, plate showing 
pressure ridges in 94 
spring at base of 34 
vegetation on 35-36 
view from, features of 36 
Big Lost River, features of 130 
Big Wood River, deflection of 133 
erosion by 68 
volcano on 67 
Birch Creek, features of 130 
Bisuka, well at, depth of.... 173 
Page. 
Black Butte, lava from, occurrence of 
caverns in . 98 
lava sheets from, occurrence of de- 
pressions in surfaces of 101 
location and features of 66-68 
Black Crater, cleft in summit of 1 19 
Blackfoot, population of 32 
Blackfoot River, upgrading of 133 
Blanche Crater, features of 70-71 
warm springs near. 71 
Bliss, lava stream that entered water 
near, section of ll(j 
springs near 162-163 
well at, depth and temperature of _ . . 173 
Blue Lake alcove, view from, into Snake 
River Canyon, plate showing. 128 
Blue Lakes, alcove in canyon wall at, fea- 
tures of 127 
springs at, use of 162 
Boise, artesian wells in and near, fea- 
tures of 174 
hillside springs at, temperature of . . . 152 
population and features of 32 
water supply of, character of . 174 
Boise granite, character of 40 
Boise Hot Springs, features of 168 
Boise River, irrigation from 31, 160 
Bombs from Cinder Buttes, characteris- 
tics of 75-79 
Box Canyon, origin and features of 127-128 
springs in , source of 165 
springs near mouth of 163 
Bradley, F. H., cited on Market Lake 
craters 108 
cited on wind-blown sand 140 
quoted on lava of Snake River Plains 65,96 
report by, reference to 46 
Breccia in walls of Snake River Canyon, 
characteristics of 115 
Brey, B. C, information furnished by . . . 70 
Bruneau, test well suggested at 179 
Bruneau River, irrigation f rom 30-31 
Bruneau Valley, artesian wells in, loca- 
tion and features of 174-175 
hot springs in, irrigation from _ 167 
wells in, elevation of artesian head 
shown by 179 
C. 
Camas River, features of 130 
Campbell, E. D., aid by 88 
CanyonCreek,lavarestingon undisturbed 
lake beds near, plate showing 1 L8 
Canyon Creek Canyon, springs in, occur- 
rence and f eatures of 1 < >' i 1 ( >1 
wall of, plate showing 64 
Canyon springs, section showing condi- 
tions favoring occurrenci i < >f IV I 
187 
