E Elaterite Basin 58 Elephant Canyon 76 Elephant Hill 2, 75 Entrada Sandstone 28, 60, 115, 116 Entrances, Island in the Sky district 2, 28, 34 Needles district 2, 60 Ernies Country 58 Erosion 21, 64, 114 landslide 106 Needles district 63 rate 21, 90 volume of rock removed 21, 112 F Facies changes 34, 47, 58, 113 Faults 48, 63, 79, 104 Floods 67 Fort Bottom 91, 92 Fossils 76, 101 Four-wheel-drive roads. _See_ Jeep trails. Fremont people 9, 12 G Gas 53, 112 Geologic history 20, _112_ Glen Canyon National Recreation Area 115 Goblin Valley State Park 116 Goose Neck 30, 31, 101 Gothic Arch 68 Grand Canyon National Park 115 Grand (Colorado) River 17, 96 Grand View Point 40 Grays Pasture 29, 36 Green River _87_ Overlook 43 River runners’ guidebook 4 Ground water 64, 65