INDEX. 
189 
Page. 
Gold in the region, occurrence of 32 
Gooding, well drilled at, unsuccessful 178 
Granite, occurrence, character, and out- 
crops of 15,39-42 
Great Basin, canyon springs in, reason for 
absence of 155 
fissure springs in, occurrence of 152, 155 
H. 
Hagernian, basalt in Snake River Canyon 
near, plate showing water- 
worn mass of 1 4(5 
Snake River Canyon near, plate show- 
ing 24 
water tunnels near 164-165 
Hagerman Bend, land at, cultivation of _ _ 30 
land at, irrigation of 164 
Hay den survey, reference to work of 46 
Healthf ulness of the region 19 
Heron, I. A., water piped by 164 
Highways of the region 33-34 
Hillebrand, W. F., analysis of lava by 87 
analysis of soil by 137 
Hot Spring, artesian wells near, features 
of 174-175 
hot springs near, irrigation from 167 
Hot Spring Creek, springs in canyon of, 
occurrence and features of _ _ _ 167 
Howe, well drilled at, unsuccessful 178 
Howell, recent stream erosion near, plate 
showing 146 
Humid regions, springs in, occurrence of. 155 
Hydrography of the region 25-28 
I. 
Ice wells, occurrence of 81 
Idaho, population of 33 
population of towns in 32 
southern, map showing approximate 
extent of Snake River lava in. 13 
State engineer of, reference to report 
by 159 
Idaho Falls, height of 28 
Idaho Falls, population of 32 
Idaho formation, occurrence and char- 
acter of 51-56 
Idaho Hydraulic and Pneumatic Irriga- 
tion Company, plan for rais- 
ing water to the plain proposed 
by 163-164 
Irrigation from surface streams, consid- 
eration of _ _ 159-162 
Irrigation and agriculture in the re- 
gion . _ ..... 28-31 
J. 
Jones, Dan, tunnel on ranch of, features 
of .' 164-165 
Jones Brothers, artesian wells on ranch 
of, features of 176 
Judd, J. "W., reference to work by 110 
K. 
Kimama, well at, depth and temperature 
of _ 173 
King, F. H., reference to paper by 148 
Kinghill Creek, Snake River lava in, 
plate showing remnant oz 60 
Page. 
Kinghill lava stream, features of 70 
Kuna Butte, features of 109-110 
plate showing • no 
L. 
Lacustral conditions, summary of 57-58 
Landslides, occurrence of 126 
Lapilli, characteristics of 74-75 
stratified, plate showing ... 108 
Lava, balls of , occurrence of 114 
cakes of, from Cinder Buttes, charac- 
teristics of 79-80 
caverns in, occurrence and features 
of 98-101 
Cinder Butte, analysis of 87 
chemical composition of 87-89 
cone of, near Arco, plate showing 112 
cones of, occurrence and features of . . 112 
expansion of, by steam on entering 
water, plate showing 92 
flows of, relative age of 105-107 
surface drainage influenced by. 104 LOS 
terminating on a plain, character 
of margins of 102 
resting on undisturbed lake beds, 
plate showing. 118 
sheets of, changes produced in, after 
cooling 118-130 
depressions in surfaces of, occur- 
rence of 101-102 
disintegration and decay of 122-123 
margins of, character of 102 105 
open fissures and faults in 118 L22 
stream cutting of 123-126 
thicknesses of, irregularities in. 117-118 
underlying the region, number 
and thickness of _ . : 112-113 
streams of. from Cinder Buttes, fea- 
tures of .. 82-87 
streams of, that entered water, occur- 
rence and features of 15,113-117 
pillow-like foils in, plate showing. 114 
section of 1 16 
spindle-like roll of lava from, sec- 
tion of 114 
terminating at the mountains, char- 
acter of margins of 102-105 
Lava Creek, lava flows in region drained 
by 68-69 
Lee's ranch, well drilled at, unsuccessful. 178 
Lewis artesian basin, features of 178 180 
Lime deposits, manner of formation of.. 142 
occurrence and character of . 141-145 
Limestone, occurrence of. _ 1.5,46 
Lindgren, Waldemar, cited 42,50,61 
quoted on lacustral deposits in Snake 
River Canyon 51 
quoted on lava flows 71 
quoted on sources of Snake River 
lava 66 
study of the region by, reference 1 < » II 
survey of the region by 38-39 
terrane named "Boise granite" by, 
extent and f eatures of 39 
Little Canyon, origin and features of 127 128 
plate showing --- 126 
Snake River Canyon near mouth of, 
plate showing north wall of . . 64 
