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Eroded Chalk Bluffs
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Collapsed Chalk Monument
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Chalk Collapse at Monument Rocks
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Monument Rocks
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Monument Rocks
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Base of Sphinx after Collapse
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The Sphinx (1983)
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Pearlette Ash Outcrop
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Pearlette Ash Pit
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Chalk Bluffs South of Castle Rock
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Castle Rock
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Fault in Chalk Formation
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Grazing Cattle
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Quarried Ash Bed
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Chalk Bluffs
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Monument Rocks
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Castle Rock—Northeast Side
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Castle Rock (1965)
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