This layer does not occur in Canyonlands.
Early- to mid-Cretaceous (64 to 144 million years ago)
Varid from alluvial fans in the south to more marine environments in the north (Book Cliffs).
Brown, cross-bedded sandstone
Visible in some areas of Arches National Park . Forms the mesa tops along Highway 666 east of Monticello and around Hovenweep National Monument.