Capitol Reef National ParkHighways and Byways
The Waterpocket Fold country can be explored fleetingly along Utah Highway 24, the major east-west highway through the park, and on the Scenic Drive, a gravel road that provides a 25-mile round-trip tour of the park. Utah Highway 24, built in 1962, follows the serpentine Fremont River as it winds its way through the Fold. Above the road tower the brilliantly colored cliffs and domes of Capitol Reef, the park's namesake. This especially majestic part of the Waterpocket Fold is named for its vaulted white rock domes and its nearly impassable ridges (pioneers sometimes called these ridges "reefs"). The Scenic Drive follows the west face of the Fold and leads into Grand Wash and Capitol Gorge, two deep, twisting, water-carved, sheer-walled canyons. Along the Scenic Drive are trails that lead to overlooks, remote canyons, natural arches, and slickrock wilderness. There are spectacular views of the Waterpocket Fold country from highways and byways beyond the park boundaries, too. One such sweeping panorama can be seen along Utah Highway 12 west of the park from an elevation of more than 9,000 feet. Roads
Notom-Bullfrog Road
Hartnet Road
Caineville Wash Road
Burr Trail Road
The Scenic Drive
Stop 1
In the hill to the left, thin beds of reddish-brown rock known as shale were formed from silt and clay that came to rest in the quiet waters of lagoons, mud flats, and coastal flood plains. This 225 million year old rock is the Moenkopi Formation. Geologists believe that the Moenkopi, more than 950 feet thick in places, was laid down in a moist, tropical climate. The gray band of rock just above the Moenkopi is a greenish-gray shale that was once volcanic ash. It's one part of the Chinle, a complex, 700-foot thick formation, which is rich in petrified wood. The Chinle ascends to the base of the reddish wall.
Stop 2
First, see how rock bands of differing thickness, colors, and textures lie one upon another like layers of a cake? The rocks of Capitol Reef were once sediments—silt, sand, clay, volcanic ash, and gravel—laid down in many different environments during the Age of Dinosaurs, and long before. The younger rocks lie on top of the older rocks. Second, notice the tilting of the rock layers. When the Colorado Plateau was born, enormous pressures deep within the earth buckled the already ancient rock beds here into a 100-mile-long—but relatively narrow—"fold." Geologists called this the Waterpocket Fold because of numerous small potholes or "pockets" found in the area that can hold rainwater. Third, study the maze of shapes carved out of the tilted rock layers. The Waterpocket Fold has been under heavy attack by erosion since its creation. Capitol Reef is one of its remnants. "Erosion" means not only the crumbling of rock by frost, plant roots, and internal water seepage, but also the blowing or washing away of the particles. Remember these three elements of the geologic story—sedimentary rock, folding, erosion—and few landforms at Capitol Reef will remain a mystery to you for long.
Stop 3
Beyond a one-mile drive, foot trails lead into the narrowest, most spectacular part of the canyon and up to a graceful curve of stone arch on the canyon's north wall—Cassidy Arch. The arch was named for turn-of-the-century outlaw Butch Cassidy, who is thought to have hidden occasionally in Grand Wash. Notice the holes at the base of a layer of yellowish-gray rock. This is the abandoned Oyler Uranium Mine, opened in 1904 when uranium was used in some "over the counter" patent medicines. This rock crumbles easily so keep back from the entrance.
Stop 4
Look closely at the massive, sheer cliffs. Focus on the base of the wall below. Do you see sweeping lines that intercept one another at varying angles in the rock? This is crossbedding. Where crossbedding occurs on a large scale like this, it means that here once drifted the windswept dunes of an ancient desert. Sediment becomes rock when it is buried and compacted by huge overlying loads of other sediment. Individual sand or clay particles are cemented together by minerals in seeping ground water. As ages pass, the cement of the ancient rock is dissolved by weak acids in rainwater. Small cracks in the rock are widened by frost and plant roots. The rock washes away in chunks and particles. This is what geologists call weathering, part of the larger process of erosion. Shallow holes you see here in the cliff are being excavated as erosion removes more weakly cemented sand grains. A few small, weather sculpted arches can be seen in Shinob Canyon, which cuts in the south wall of Grand Wash to your right. Cassidy Arch is nestled high in the cliffs to your left.
Stop 5
Although the channel beyond the bank to your right carries no water most of the time, it does occasionally. Many plants thrive nearby. Some, like Apache-plume, are rarely found away from washes such as this. Other species here like rabbitbrush also tolerate drier environments. There can be too much water. In the continuing process of erosion, flash floods roar down the canyon carrying debris that crushes and smothers vegetation. Plant life survival means a compromise between a demand for water and a need for protection from floods.
Stop 6
The sweeping lines of crossbedding that form in dune sands are missing here. The surfaces of many slabs are covered with ripple marks and mud cracks that formed when wet mud dried under a hot sun. Sometimes the tracks of an extinct, primitive reptile called Chirotherium can be seen in the rock slabs. This sandstone was laid down not by desert winds, but by the gently moving, shallow waters of coastal tidal flats.
Stop 7
Stop 8
Stop 9
The right fork of the road here leads to Pleasant Creek, one of the few perennial streams in the park. Consider the weather before you proceed into the gorge.
Stop 10
The Wingate and Navajo—both formed from ancient deserts—seem to erode differently. The Wingate tends to make sheer cliffs; the Navajo rounded domes. The reason lies in the rock layers upon which these "petrified deserts" rest. The Wingate lies on the soft beds of the Chinle Formation. Because this softer rock erodes more rapidly and undercuts the Wingate, the massive sandstone often breaks away to form sheer cliffs. By contrast, the Navajo rests on the reddish rock layer that forms the base of the canyon walls on both side of you. This water-deposited sandstone—the Kayenta Formation—provides a firm foundation. The Navajo is undercut less often than the Wingate and erodes away in smoother contours. Kayenta lies just above the Wingate and just below the Navajo Formation. It is about 350 feet thick and 190 million years old.
Stop 11
A short stroll down the canyon takes you by the vandalized remains of some ancient rock art or petroglyphs. American Indian farmers of the Fremont Culture cultivated their crops along the streams of Capitol Reef until about 1300 A.D. In 1884 it took Mormon pioneers eight days to clear the first road through the Gorge, and settlers had to remove heavy debris after every flash flood. When Utah Hwy 24 was opened in 1962, the road was closed. Early travelers recorded their passage on the canyon walls at the Pioneer Register.
Last Updated: 15 Sep 2010
Published: 29 Apr 2002 The details, dates, and prices mentioned in this article were accurate at the time of publication. Post Your CommentGORP.com's Featured Content |
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