Palo Duro Canyon
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Palo Duro Canyon is a canyon system of the Caprock Escarpment in the Panhandle of Texas (USA). As the second largest canyon in the United States, it is roughly 120 miles long and has an average width of 6 miles, but reaches a width of 20 miles at places. Its maximum depth is 800 feet. Palo Duro Canyon has been called "The Grand Canyon of Texas," both for its size and for the dramatic geological features, including the multicolored layers of rock and steep mesa walls which are similar to those in the Grand Canyon.
The canyon was formed by the Prairie Dog Town Fork of the Red River which winds along the relatively flat Caprock of West Texas. Water erosion over the millennia has been aided by wind erosion to shape the canyon's geological formations.
Notable canyon formations include caves and hoodoos.
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[edit] History
The first evidence of human habitation of the canyon dates back approximately 10,000–15,000 years, and it is believed to have been continuously inhabited to the present day. Native Americans were attracted to the water of the Prairie Dog Town Fork of the Red River, as well as the consequent ample game, edible plants, and protection from weather that the canyon provided.
The first European explorers to discover the canyon were members of the Coronado expedition, who visited the canyon in 1541. Apache people lived in Palo Duro at the time, but they were later displaced by Comanche and Kiowa groups, who had the advantage of owning horses brought over by the Spanish. They had contact with traders in nearby New Mexico, called Comancheros.
A United States military team under Captain Randolph B. Marcy mapped the canyon in 1852 during their search for the headwaters of the Red River. The land remained under Native American control until a military expedition led by Colonel Ranald S. Mackenzie was sent in 1874 to remove the Natives to reservations in Oklahoma. In a lucky coup, the Mackenzie expedition was able to capture thousands of the Natives' horses and destroy them in nearby Tule Canyon. Demoralized and denied their main weapon and source of livelihood, the Comanche and Kiowa conceded and left the area.
Soon after, in 1876, Charles Goodnight established the JA Ranch in Palo Duro Canyon. Over the next half century, the canyon remained in private hands, but was an increasingly popular tourist spot for local residents. In 1934, the upper section of the canyon was purchased by the State of Texas and turned into the Palo Duro Canyon State Park. Amarillo is the largest city adjacent to Palo Duro Canyon State Park.
[edit] Geology
Palo Duro Canyon itself was downcut by the Prarie Dog Town Fork of the Red River during the Pleistocene, when the whole region was uplifted. (Spearing 381) Most of the strata visible in the Canyon were deposited during the Permian and Triassic periods. From oldest to youngest, the formations are as follows:
- Quartermaster Formation: Permian in age, this comprises the red, lower slopes of the Canyon. This layer was deposited in a shallow marine environment that alternated with dry tidal flats, indicated by ripple marks and gypsum evaporite deposits, respectively.[1]
- Tecovas Formation: Part of the Dockum Group with the Trujillo Formation, this multicolored Triassic unit consists of shale, siltstone, and sandstone. Deposited in streams and swamps, its colors indicate varying oxidizing conditions, and the alternating dry / wet cycles typical of such environments. These rocks are fossiliferous, containing the remains of phytosaurs, amphibians, and fish.[2]
- Trujillo Formation: This Triassic formation is harder than the underlying Tecovas, and forms many of the Canyon's ledges. Composed of coarse sandstone, river cross-bedding indicates deposition in a stream environment. Fossils are rare.[3]
- Ogallala Formation: This late Miocene to early Pliocene unit forms the cliffs and ledges at the very top of the Canyon. Comprised of sandstone, siltstone, and conglomerate eroded from a late Cenozoic uplift of the Rocky Mountains, it is separated from the lower Trujillo Formation by a disconformity, and a very long hiatus. Fossils of saber-toothed cats (Smilodon), bone-crushing dogs (Borophagines), mastodons, horses, long-necked camels (Aepycamelus), rhinoceroses, and tortoises are present in the Ogallala.[4]
See also: Ogallala Aquifer
[edit] References
- ^ Spearing, Darwin. Roadside Geology of Texas. Missoula: Mountain Press Publishing Co., 1991. ISBN 0-87842-265-X pp. 377, 383
- ^ Spearing, 384-5
- ^ Spearing, pp. 384-5
- ^ Spearing, pp. 355-6, 385
[edit] See also
[edit] External links
- Palo Duro Canyon State Park official website
- Texas Parks and Wildlife: Palo Duro Canyon
- Read Exploration of the Red River, by Randolph Marcy, 1852, hosted by the Portal to Texas History.
- Handbook of Texas Online: Palo Duro Canyon
- Permo-Triassic Redbeds
