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• 21 Ecology and Natural Resources

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• 21 Still image

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• 8 Landscapes
• 8 Sandstone
• 7 Rivers
• 7 Transportation
• 7 Water
• 6 Exposed rock
• 6 Glacial landforms
• 6 Limestone
• 6 Parks and natural areas
• 6 Terraces
• 4 Bridges
• 4 Formations
• 4 Platteville formation
• 4 Saint Peter sandstone
• 3 Geologists
• 3 Men
• 3 People
• 3 Vehicles
• 2 Buildings
• 2 Cars
• 2 Franconia sandstone
• 2 Jordan sandstone
• 2 Oneota limestone
• 2 Sand
• 1 Camps
• 1 Caves
• 1 Cliffs
• 1 Dolomite
• 1 Factories
• 1 Mounds

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• 8 Hotchkiss, William Otis, 1878-1954
• 8 Thwaites, F. T. (Fredrik Turville), 1883-1961
• 5 Blanchard, W. O. (William Oscar), 1886-1952

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• 5 WI04T06NR06WS18
• 2 WI04T03NR05WS02
• 2 WI04T05NR04WS36
• 2 WI04T07NR03WS02
• 2 WI04T08NR03WS27
• 1 WI04T01NR02W
• 1 WI04T01NR02WS09
• 1 WI04T01NR02WS20
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• 1 WI04T06NR06WS17
• 1 WI04T06NR06WS24
• 1 WI04T07NR07WS25