Northwest Escarpment Llano Estacado 2003

The Caprock Escarpment is a term used in

West Texas West Texas is a loosely defined region in the U.S. state of Texas, generally encompassing the desert climate, arid and semiarid climate, semiarid lands west of a line drawn between the cities of Wichita Falls, Texas, Wichita Falls, Abilene, Texa ...

and Eastern New Mexico to describe the geographical transition point between the level High Plains of the

Llano Estacado The Llano Estacado (), sometimes translated into English as the Staked Plains, is a region in the Southwestern United States that encompasses parts of eastern New Mexico and northwestern Texas. One of the largest mesas or tablelands on the North A ...

and the surrounding rolling terrain. In Texas, the escarpment stretches around south-southwest from the northeast corner of the Texas Panhandle near the

Oklahoma Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...

border. The escarpment is especially notable, from north to south, in Briscoe, Floyd,

Motley Motley is the traditional costume of the court jester, the motley fool, or the arlecchino character in ''commedia dell'arte''. The harlequin wears a patchwork of red, green and blue diamonds that is still a fashion motif. The word ''motley'' is ...

, Crosby,

Dickens Charles John Huffam Dickens (; 7 February 1812 – 9 June 1870) was an English novelist, journalist, short story writer and social critic. He created some of literature's best-known fictional characters, and is regarded by many as the great ...

, Garza, and Borden Counties. In New Mexico, a prominent escarpment exists along the northernmost extension of the Llano Estacado, especially to the south of San Jon and Tucumcari, both in Quay County, New Mexico. Along the western edge of the Llano Estacado, the portion of the escarpment that stretches from

Caprock Caprock or cap rock is a hard, resistant, and impermeable layer of rock that overlies and protects a reservoir of softer organic material, similar to the crust on a pie where the crust (caprock) prevents leakage of the soft filling (softer materia ...

to Maljamar, New Mexico, is called the Mescalero Ridge.

Description

The escarpment is made of

caliche Caliche () is a soil accumulation of soluble calcium carbonate at depth, where it precipitates and binds other materials—such as gravel, sand, clay, and silt. It occurs worldwide, in aridisol and mollisol soil orders—generally in arid or se ...

—a layer of

calcium carbonate Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in Rock (geology), rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skel ...

that resists erosion. In some places, the escarpment rises around above the plains to the east. The escarpment's features formed by erosion from rivers and streams, creating arroyos and highly diverse terrain, including the large Palo Duro Canyon southeast of

Amarillo, Texas Amarillo ( ; Spanish language, Spanish for "yellow") is a city in the U.S. state of Texas and the county seat of Potter County, Texas, Potter County, though most of the southern half of the city extends into Randall County, Texas, Randall County ...

. One will notice the change in elevation of several hundred feet while crossing the Caprock Escarpment on

Interstate 40 Interstate 40 (I-40) is a major east–west transcontinental Interstate Highway System, Interstate Highway in the Southeastern United States, southeastern and Southwestern United States, southwestern portions of the United States. At a leng ...

between Adrian, Texas and San Jon, New Mexico. The overall slight upslope, and in some areas, convergent, terrain of the Caprock is implicated in altering local weather and climate, such as enhancing

precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls from clouds due to gravitational pull. The main forms of precipitation include drizzle, rain, rain and snow mixed ("sleet" in Commonwe ...

and promoting

thunderstorm A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning and its acoustics, acoustic effect on the Earth's atmosphere, known as thunder. Relatively weak thunderstorm ...

initiation and organization.

Parks

Caprock Canyons State Park and Trailway, located near Quitaque, Texas, opened in 1982. A 65-mi (105-km) trail was developed within the park in 1992. Along the trail is Clarity Tunnel, home to a large colony of

Mexican free-tailed bat The Mexican free-tailed bat or Brazilian free-tailed bat (''Tadarida brasiliensis'') is a medium-sized bat native to North, Central, and South America and the Caribbean, so named because its tail can be almost half its total length and is not a ...

References

External links

* * {{Handbook of Texas, id=rxc01, name=Caprock
Public domain images of the Llano Estacado, West Texas, and Eastern New Mexico
Escarpments of the United States Landforms of Texas Landforms of New Mexico Llano Estacado

Description

Parks

See also

References

External links