21. Big Piney, Mo. Yale Public content 1943. 2011-12-12T21:30:31Z. 2022-03-29T20:39:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Missouri.
22. Blackfoot Yale Public content 1943. 2011-12-12T21:25:13Z. 2022-03-29T20:39:10Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Idaho.
23. Blairsden, Calif Yale Public content 1943. 2011-12-12T21:22:26Z. 2022-03-29T20:38:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. California.
24. Blockton, Mo-Iowa Yale Public content 1943. 2011-12-12T21:30:32Z. 2022-03-29T20:39:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Iowa and Missouri.
25. Boehls Butte Yale Public content 1943. 2011-12-12T21:25:13Z. 2022-03-29T20:39:10Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Idaho.
26. Boylston, Wash Yale Public content 1943. 2011-12-12T21:39:16Z. 2022-03-29T20:40:53Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Washington.
27. Brussels, Mo-Ill Yale Public content 1943. 2011-12-12T21:30:33Z. 2022-03-29T20:39:51Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Missouri.
28. Carlisle, Penn Yale Public content 1943. 2011-12-12T21:36:06Z. 2022-03-29T20:40:32Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
29. Carlsbad Caverns West, N. Mex.-Tex Yale Public content 1943. 2011-12-12T21:32:46Z. 2022-03-29T20:40:09Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. New Mexico and Texas.
30. Carlsbad, N. Mex Yale Public content 1943. 2011-12-12T21:32:46Z. 2022-03-29T20:40:09Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. New Mexico.