Chapter D

Dark Angel 92
De Chelly Sandstone Member, Cutler Formation 102
Dead Horse Point 33
Dedication of the park 8
Delicate Arch 16, 25, 74, 75, 77
Delicate Arch area, number of arches 41
Density, average, Paradox Member 32
Deposition of rock materials, environments _20_
Desert varnish 10
Development of the arches _37_
Devils Garden 2, 5, 25, 79, _83_, 86
fins 42
number of arches 41
trail 88, 92
Dewey Bridge 52
Dewey Bridge Member 46, 63
Entrada Sandstone, composition 41
“hoodoos and goblins” 66
park road cutting 57
The Windows section 71
vertical arches 44
“Dewey Road” 16
Diapir 83
Differential erosion 42
Dinosaur National Monument 101, 102
Dissimilarity of Arches vs. Canyonlands 23, 24
Double Arch 2, 46, 72
Double O Arch 90, 92, 98
Drainage, Arches National Park 18
Dry Mesa 5, 56

E
Eagle Park 25, 98
number of arches 41
Early dwellers _9_
Earthquake, rock offset along bedding plane 63
Egyptian queen, arch resembling 63
Eisenhower, Dwight D., Mission 66 4
Elephant Butte 72
Elephant Butte folds 68
Elizondo, Emmett 13
Entrada Sandstone 23, 74, 102, 103
arches, modes of origin 42
caves 9
cut by normal fault 57
Moab Member 24
no water found 87
Environments of deposition _20_
Erosion 99
Colorado Plateau _33_
Evaporation basins 99
Evaporites 30
Eye of The Whale 69

F
Facies changes 22
“Father of the monument,” J. W. Williams 1, 4
Faults, Cache Valley anticline 34
Salt Valley anticline 34
Fiery Furnace 25, 42, 73, _79_, 83
number of arches 41
Fins 63, 79
Float trip, nighttime illuminated, down Colorado River 52
Folds _24_, 30, 100
Four-wheel-drive vehicles 69
Fractures _24_
Fremont people, occupation of area 9
pictographs 10
Frost, prying action 42

G
Garden of Eden 50, 69, 70
Gas exploration, deep tests 15, 99
Geographic setting _18_
Geologic age of rocks in park _98_
Geologic events forming the Colorado Plateau _98_
Geologic history, summary _98_
Geologic Time Spiral 101, 103
Geology, at the park entrance 57
Glen Canyon Group 52, 102, 103
Glen Canyon National Recreation Area 101, 103
Goblin Valley State Park 66, 103
Gould, Lawrence M. 1
Goulding, Harry, first person to drive into The Windows section 2, 69
Grabens 34
Grand Canyon National Park and National Monument 102
Gravity anomalies, Salt Valley 32
Green River 103
Ground water 41
“Guide to an Auto Tour of Arches National Park,” (The) 5, 50, 51, 72
Gulf of California 33

H
Hastier, (Mrs.) Hazel Wolfe 13
Headquarters area _57_
Henry Mountains 101
Herdina Park 25, 69
number of arches 41
Hermosa Formation, Paradox Member 23, 25, 29, 30, 32
History, early _9_
geologic, summary _98_
“Hoodoos and goblins” 66, 103
Hoover, Herbert, proclamation 1
Horizontal arches 44
Horseshoe Canyon, pictographs 10
Horseshoe Canyon Detached Unit of Canyonlands 23
Humid regions, subdued rounded landforms 37