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The Sphinx (1983)
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Cobra Rock (1963)
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Collapsed Natural Bridge
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Documenting Excavation at Middle Beaver Creek
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Lead Mine Tailings
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Doe at Fitch Natural History Reservation
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Niobrara Chalk Outcrops
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Evening at Teter Rock
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Topeka (Aerial)
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Red Buffalo Ranch
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Niobrara Chalk Badlands
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Niobrara Chalk Bluffs
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Fault in Chalk Formation
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Castle Rock (1965)
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Chalk Bluffs West of Elkader
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Echo Cliff on Mission Creek
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Coronado Heights
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Ogallala Formation Outcrop
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