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Colorado’s three geologic provinces 2
Pikes Peak, seen from the Garden of the Gods 4
Rock classification (chart) 5
Stratigraphic column (chart) 7
Jurassic rocks in Colorado (map) 9
East face of Longs Peak 11
Rocky Mountain National Park (east-west profile) 12
Big Thompson Canyon, west of Loveland 13
Red Rocks Amphitheater, west of Denver 14
Colorado Springs area (map and cross section) 15
Joint systems in Precambrian rocks, Boulder Canyon 15
Spanish Peaks, southwest of Walsenburg 18
Hahn’s Peak, north of Steamboat Springs 19
Gore Range from the east 20
Aspen Mountain geology (map) 23
Mt. Sopris, south of Glenwood Springs 24
Ouray, in the San Juan Mountains 25
Steamboat Rock, Dinosaur National Monument 27
Grand Hogback, near Rifle (block diagram) 28
Mt. Garfield, near Grand Junction 30
Precambrian-Cambrian unconformity south of Ouray 34
Geologic map of Colorado 35
Black Canyon of the Gunnison National Monument 36
Precambrian-Cambrian unconformity, Glenwood Canyon 38
Cambrian fossils 39
Ordovician fossils 41
Devonian fossils 43
Mississippian fossils 44
Pennsylvanian paleogeography (map) 45
Fountain Formation northwest of Denver 45
Pennsylvanian fossils 46
Contorted Pennsylvanian rocks near Gypsum 46
Balanced Rock, Garden of the Gods 48
Permian reptile tracks 49
The Flatirons, near Boulder 50
Colorado National Monument 51
Morrison Formation, west of Denver 53
Dinosaur bones, found near Morrison 54
Dakota Sandstone hogback 56
Cretaceous fossils 57
Wolford Mountain, north of Kremmling 60
Eohippus, the “Dawn Horse” 61
Golden and South Table Mountain 62
Devil’s Staircase, near Spanish Peaks 63
Green River oil shale, west of Rifle 64
Florissant Fossil Beds National Monument 65
Pawnee Buttes, north of Fort Morgan 66
Fossil mammals, northeastern Colorado 67
Glacial lakes in Rocky Mountain National Park 68
Arapaho Glacier, west of Boulder 70
Pleistocene mastodons 72
Great Sand Dunes National Monument 73
Colorado Mineral Belt (map) 78
Sluicebox mining in early Colorado 81
Early-day Leadville 82
Gold dredge, Fairplay 84
Silverton, in the San Juan Mountains 86
Abrams Mountain, south of Ouray 87
Creede and its mines (map) 89
Cripple Creek, near Pikes Peak 90
Climax molybdenum mine (cross section) 91
Rampart Range quarry, near Colorado Springs 98
Yule Marble quarry, near the town of Marble 99
Lyons Sandstone quarry 100
University of Colorado Museum 100
Colorado-Big Thompson Project (cross section) 103
San Luis Valley (cross section) 105
Cave of the Winds, near Manitou 107
Mesa Verde cave and Indian dwellings 108
Glenwood Hot Springs 109