Region
Texas
Austin
3
Brazoria County
3
Calcasieu Parish
3
Louisiana
3
Palo Duro Basin
3
Deaf Smith County
2
Galveston Bay
2
Galveston Bay (Tex.)
2
Houston
2
New Mexico
2
Swisher County
2
Amarillo Region
1
Brazos River Watershed
1
Colorado
1
Culberson County
1
Culberson County (Tex.)
1
Davis Canyon
1
Denver
1
Edwards Plateau
1
Flower Garden Banks National Marine Sanctuary
1
Fort Hood
1
Guadalupe Mountains National Park (Tex.)
1
Gulf Coast (U.S.)
1
Longview
1
Marble Falls
1
Matagorda Bay
1
Mexico, Gulf of
1
Oklahoma
1
Padre Island National Seashore
1
Palo Duro Basin (Tex.)
1
San Antonio
1
Travis Peak Formation (Tex.)
1
Utah
1