southern california and the southwest,”Southern California and theSouthwest (Figure 2.51) are unitedprimarily by their attractive warm,dry climate; by their increasingdependence on water fromoutside the region; and by theirlong and deep cultural ties toMexico.• The varied landscapes of theSouthwest include the Pacificcoastal zone, the hills and interiorvalleys of Southern California, thewidely spaced mountains anddramatic mesas and canyons ofsouthern Arizona and New Mexico

southern california and the southwest,”Southern California and theSouthwest (Figure 2.51) are unitedprimarily by their attractive warm,dry climate; by their increasingdependence on water fromoutside the region; and by theirlong and deep cultural ties toMexico.• The varied landscapes of theSouthwest include the Pacificcoastal zone, the hills and interiorvalleys of Southern California, thewidely spaced mountains anddramatic mesas and canyons ofsouthern Arizona and New Mexico

and the gentle coastal plain ofsouth Texas.”