"Caprock" is a geological term for a harder or more resistant rock type overlying a weaker or less resistant rock type, and lends its name to the Caprock Escarpment that defines the edge of the high plains of the Llano Estacado.
Along the western edge of the Llano Estacado, the portion of the escarpment that stretches from Caprock to Maljamar, New Mexico is called the Mescalero Escarpment or Mescalero Ridge.
The Caprock Chief or Caprock Xpress was a proposed Amtrak inter-city rail service which would run from Fort Worth, Texas to Denver, Colorado, passing through the Texas Panhandle, which currently does not have passenger rail service of any kind.