The two members of the Entrada Formation: slickrock member and Moab member.

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The contact between the slickrock (red, lower) and Moab (whitish, upper) members of the Entrada Formation (or according to some geologists, Entrada and Curtis formations, respectively) is easy to see in this little bluff next to the Old Gordon/Echo Canyon trail in the Colorado National Monument.

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Size: 3828px × 2546px
Location: Monument Road / Glade Park Rd, Redlands, Colorado USA
Photo credit: © Ken Barber / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: colorado, curtis, formation, geology, jurassic, monument, national, sandstone, slope, travel, west