[Italic page numbers indicate major references]
A
Page
Acknowledgments 49
Agriculture 30
Alaska 11
Anadarko basin 11, 16
Arikaree Formation 18
Arkansas River 2, 7, 23, 25, 29, 30, 42, 43, 44, 48
Artesia, N. Mex. 46
Austin, Tex. 47
B
Bad River 39
Badland development 39
Badlands National Monument 39
Balcones fault zone 23, 46
Basalt flows 20, 24
Bearpaw Mountains 33, 36
Belle Fourche River 39
Bents Fort, Colo. 2
Big Basin, Kans. 48
Big Belt Mountains 36
Big Snowy Mountains 36
Bison 1
Black Hills 7, 11, 18, 19, 20, 37
Border Hills 46
Bottomless Lakes, N. Mex. 45
Brazos River 23
Burnet, Tex. 23
C
Camels 16, 18
Canada 1, 5, 33
Canadian escarpment 23, 46
Canadian River 23, 29, 30, 46
Cannonball River 33, 35, 39
Canon City, Colo. 43
Caprock escarpment 7, 29
Capulin Mountain 20, 23
Carlsbad, N. Mex. 46
Carlsbad Caverns, N. Mex. 45
Carrizo Creek 25
Castle Mountains 37
Castle Rock, Colo. 43
Castle Rock Conglomerate 43
Caverns of Sonora 47
Cedar Point 43
Central Lowland 5, 34
Central Texas Uplift 7, 19, 20, 22
Cheyenne, Wyo. 27
Cheyenne River 39
Cimarron River 48
Cirques 38
Clark County, Kans. 48
Climate 2
Coal 16
Coastal Plain 5, 7, 10, 47
Colorado 19
Colorado Piedmont 7, 10, 19, 23, 42, 48, 49
Colorado Plateau 46
Colorado River 23
Colorado Springs, Colo. 43
Coteau du Missouri 34, 35
Crazy Mountains 37
Creosote 1
Cretaceous Period 11, 16, 19, 24, 43, 46, 48
D
Dakota hogback 43
Dakota Sandstone 22, 23, 24, 46
Dawson Formation 16
Dead-ice moraines 34
Definition 1
Deformation 11
Denver, Colo. 42
Denver Formation 16
Deposition 10, 11, 32, 44
Devils River 46
Devils Tower, Wyo. 37
Differential erosion 23, 25, 42
Dikes 25
Dinosaurs 16
Drift 34
E
Edwards Plateau 10, 19, 29, 46, 48
Eocene Epoch 16
Epilogue 49
Erosion 18
Escarpments 4, 7, 23, 34
Eskers 35
F
Farming 30
Fishers Peak 23
Fissures 20
Forests 1, 2, 7
Fort Union Formation 16, 40
Fossils 16
Frio River 46
Front Range 43
G
Gangplank 27
Gas 30, 47, 49
Glaciation 2, 5, 11, 33
Grand River 39
Great Bend, Kans. 2
Great Bend Plains 48, 49
Great Falls, Mont. 33, 35
Great Ice Age 5
Great Lakes 5
Guadalupe River 46
Gulf Coastal Plain 7
H
Harney Peak 20
Havre, Mont. 33
Heart River 33, 35, 39
Hell Creek Formation 11
High Plains 7, 10, 25, 45, 48
Highwood Mountains 33, 35, 36
Horses 16, 18
Hudson Bay 32, 33
I
Ice Age 5
Independence, Mo. 2
Interior Highlands 5
Interior Plains 5, 11
Interstate Highway 25 43
Interstate Highway 70 4
Introduction 1
J
Jewel Cave 21
Joints 20
Judith Mountains 36
Judith River 38
Juniper 1
K
Kames 35
Kansas 10, 48
Kansas City, Mo. 35
Karst topography 45
Kearney, Nebr. 2
King Mountain 29
Knife River 33, 35, 39
L
Laccoliths 37
Lake development 34, 39
Lance Formation 11
Laramie Formation 16
Lava flows 37
Lewis and Clark expedition 2
Limestone Plateau 21, 22
Limon, Colo. 4, 43
Little Basin, Kans. 48
Little Belt Mountains 36
Little Missouri River 33, 35, 38, 40
Little Rocky Mountains 33, 36
Littlefield, Tex. 30
Llano Estacado 29, 30
Loess 29
Longhorn Caverns 23
M
Marias River 33
McCamey, Tex. 29
Medicine Lodge River 48
Medina River 46
Mesa de Maya 20, 24, 25
Mescalero escarpment 7, 29, 45, 46
Mesquite 1
Mexico 1, 11
Milk River 33
Minneapolis, Kans. 48
Miocene Epoch 23
Missouri escarpment 34
Missouri Plateau 7, 19, 20, 32, 48, 49
Missouri River 5, 7, 25, 32, 33, 35, 38
Montana 33
Monument Rocks 48
Moraines 34
Moreau River 39
_Moropus_ 18
Mount Rushmore 20
Musselshell River 38
N
Nebraska 7, 29
Nebraska Sand Hills 29
Needles area, Black Hills 20
New Mexico 7, 19, 45
North Canadian River 48, 49
North Dakota 33, 34, 35
Nueces River 46
Nunataks 33
O
Oak trees 1
Odessa, Tex. 30
Ogallala Formation 18, 23, 24, 25, 27, 29, 45, 46
Ohio River 5
Oil 30, 46, 47, 49
Oklahoma 7
Oligocene Epoch 16, 43
Oregon Trail 2
Ouachita province 5
Outwash plains 35
Ozark Plateaus 5
P
Paleocene Epoch 16, 23
Paleozoic Era 21, 30, 45
Palmer Lake 43
Pampa, Tex. 30
Pawnee Buttes 42
Pecos River 7, 25, 45, 46
Pecos Valley 7, 10, 19, 23, 45, 48, 49
Pedernales River 47
Pike, Zebulon iii, 2
Pine Ridge escarpment 7, 29, 40
Pioneers 2
Plains Border Section 19, 48
Platte River 2, 25, 29
Pleistocene Epoch 5
Poison Canyon Formation 16, 23, 24
Powder River 39
Powder River Basin 39
Purgatoire Formation 24
Purgatoire River 25
R
Racetrack, The 22
Rainfall 2
Rapid City, S. Dak. 20
Raton Basin 24
Raton Formation 16
Raton Mesa 20, 23
Raton section 10, 20, 23, 45
Red Hills 48, 49
Red Valley 22
Republican River 4, 29, 48
Rhinoceroses 16, 18
Rio Grande 7, 45
Rocky Mountains 5, 19
Roswell, N. Mex. 45
S
Sabinal River 46
Salina, Kans. 4
Saline River 4, 48
San Antonio, Tex. 47
Sand dunes 44, 49
Sand Hills, Nebr. 29
Sangre de Cristo Mountains 7, 45, 46
Scotts Bluff National Monument 27, 42
Sedimentation 10, 11, 32
Shonkin Sag 35
Sinkholes 47, 48
Skyline Drive, Canon City, Colo. 43
Smith River 38
Smoky Hill River 4, 48
Smoky Hills 48, 49
Soil development 16
Solomon River 4, 48
Solution cavities 45, 47, 48
Sonora, Tex. 47
South Dakota 20, 29, 33, 34
South Dakota Badlands 16
South Platte River 4, 7, 42, 43, 44
Spanish Peaks 19, 24
Spruce trees 2
Stream deposition 11, 32
Summary 49
Sun River 38
Superior Upland 5, 10
Sweetgrass Hills 33
Sylvan Lake 20
T
Tapirs 16
Tertiary Period 42, 43, 45, 46, 48
Teton River 33
Texas 7
Theodore Roosevelt National Memorial Park 35, 40
Till 34
_Titanotheres_ 16
Tongue River 39
Trails 2
Trees 1, 2, 7
Triassic Period 21
Triceratops 16
Trinidad, Colo. 25
U
Uplift 11, 16, 19, 32, 37
V
Valley development 39
Vaughn, N. Mex. 45
Vegetation 1, 2, 7, 10, 16
Vermejo Formation 16
Volcanoes 16, 20, 40
W
Walsenburg, Colo. 24
Warping 11
Well-drilling 11
West Nueces River 46
White River 29, 39, 40
White River Group 16, 40, 44
Williston basin 11, 16, 33
Wind Cave 21
Wind deposition 44
Wyoming 20, 39
Y
Yellowstone River 33, 38
[Illustration: U. S. DEPARTMENT OF THE INTERIOR • March 3, 1849]