Spatial Coverage
- North America.3
- North Carolina3
- North Dakota3
- North Dakota.3
- Northwest, Old3
- Oklahoma.3
- Ontario3
- Oregon3
- Pennsylvania3
- Red River Valley (Tex.-La.)3
- Red River Valley (Texas and Louisiana)3
- San Juan Basin (N.M. and Colo.)3
- San Juan Basin.3
- Sierra Nevada (Calif. and Nev.)3
- Sierra Nevada.3
- Snake River Plain (Idaho and Or.)3
- Snake River Plain.3
- South Dakota3
- Toiyabe National Forest (Nev. and Calif.)3
- Toiyabe National Forest.3
