The Caprock Escarpment is a term used in West Texas and Eastern New Mexico to describe the geographical transition point between the level High Plains of the Llano Estacado and the surrounding rolling terrain.- Caprock Escarpment
Portions of Eastern New Mexico's elevation extends to over 4000 ft. The region is characterized by flat, largely-featureless terrain with the exception of the Pecos River valley and the abrupt breaks along the Mescalero Ridge and northern caprock escarpments of the Llano Estacado.- Eastern New Mexico
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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.
To the east, the Caprock Escarpment, a precipitous cliff about 300 ft high, lies between the Llano and the red Permian plains of Texas; while to the west, the Mescalero Escarpment demarcates the eastern edge of the Pecos River valley.