Gemini Bridges Road... John Buchanan November 18, 2020 north of Moab, Utah was the objective of exploration today. View south, towards the LaSal Mountains, with Highway 191 nearly following the Moab fault. The strata on the east (left side) of the fault have been dropped between 2,600 and 3,150 feet (800 to 960 meters) relative to the west (right) side. The so-called Gooney Bird Rock, an eroded outcrop of Wingate Sandstone (Jurassic). This isolated monolith in the Wingate Sandstone is dubbed “The Bride.” Gemini Bridges, side view. The lighter-colored capping sandstone belongs to the Kayenta Formation (Jurassic) with the underlying Wingate Sandstone in which the arches are formed. View into Bull Canyon showing the densely and parallel-jointed Wingate Sandstone in the distance. View fullsize Gemini Bridges. (Click image to enlarge.) Although these are named “bridges” they are technically natural arches as they do not span a valley of erosion.