English: This image shows one of the only outcrops of the Pennsylvanian Period Honaker Trail Formation that may be viewed in the vicinity of Moab. In this setting the Honaker Trail Formation serves as the base of a strata graphic sequence which form the cliffs that occur on the west side of the Moab valley. This outcrop occurs across highway 191, immediately opposite and directly south of, the visitor center parking lot at Arches National Park. The Honaker Trail Formation underlies the visible strata throughout the area, but is buried and impossible to view elsewhere in the near vicinity of Moab. The fault and the road cut for highway 191 provide a rare circumstance where visitors to Moab, Arches National Park, and Canyonlands National Park may see this approximately 300 miilion year old Pennsylvanian Period layer of rock.

sources:

1) http://www.gly.uga.edu/railsback/VFT/VFTMoabFault.html

2) http://geology.byu.edu/home/sites/default/files/geo-stud-volume-19-part-2-melton1.pdf