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

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This is the contact between the Fountain & Lyons formations. The bottom of the Lyons formation is near the top of the picture (thinner, flat cross bedding). The top of the Fountain is just below it, extending to the base of the image.
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This is the contact between the Fountain & Lyons formations. The bottom of the Lyons formation is near the top of the picture (thinner, flat cross bedding). The top of the Fountain is just below it, extending to the base of the image.