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Geology of Colorado (Boulder Valley) - Field Trip #1, Stop #5: Lykins, Canyon Spring, Morrison, Dakota Formations

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Upper Lykins formation: Straight (or oscillatory) crested sand ripples on ancient surface. (caused by back and forth motion of the water)
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Upper Lykins formation: Straight (or oscillatory) crested sand ripples on ancient surface. (caused by back and forth motion of the water)



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