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Geology of Colorado (Boulder Valley) - Field Trip #1, Stop #3: Fountain & Lyons Formations

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The Lyons formation is often has large wedge shaped bedding which is common in sand dunes. Breaks in concoidal fractures because of quartz cemented by quartz.
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The Lyons formation is often has large wedge shaped bedding which is common in sand dunes. Breaks in concoidal fractures because of quartz cemented by quartz.



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