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Castle Rock Before 2001 Collapse
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Castle Rock—Northwest Side (1970)
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Cobra Rock (1963)
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Chalk Badlands
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Open Mines, Asphalt Lake (Aerial)
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Chalk Bluffs
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Confluence of Kansas and Missouri Rivers at Kaw Point
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Castle Rock Before 2001 Collapse
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Chalk Canyons
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Niobrara Chalk Badlands
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Castle Rock and Eroded Chalk Bluffs
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Chalk Bluffs
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Chalk Bluffs Near Castle Rock
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Little Pyramids
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Dissolution Slump
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Sinkhole
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Elephant Rock (now collapsed)
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Measuring Groundwater in Dry Riverbed
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