Costal Plains: Gulf of Mexico, High Population, High Precipitation, Low Elevation, Austin & Houston, The Most Rivers, South Texas Plains: San Antonion/Alamo, Blackland Praries Dallas, North Central Plains: Rolling Plains, Fort Worth, Abilene, Moderate Population, Moderate Precipitation, Moderate Elevation, Some rivers, Flat Farmland, Great Plains: Palo Duro Canyon, Oil Towns: Midland, Odessa, High plains: Amarillo & Lubbock , a few rivers, Moderate to low Population, Moderate to low Precipitation, Moderate to high elevation, Mountains & Basins: Guadalupe Peak, NO SUBREGIONS, EL Paso, Low Population, Low Precipitation, High Elevation, DRY/DESERT, Rio Grande is the Only Water Source,

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