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

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Canyon Spring sandstone: Ancient dunes with truncated crossbeds, wind blown lags (small, evenly dispersed pebbles). Canyon Spring sandstone averages only 30 ft in thickness.
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Canyon Spring sandstone: Ancient dunes with truncated crossbeds, wind blown lags (small, evenly dispersed pebbles). Canyon Spring sandstone averages only 30 ft in thickness.