Gypsum from Adams County, Ohio, USA
USA | |
| Carlson, E.H. (2002) Ohio mineral locality index, part 2 – concretions, and miscellaneous occurrences. Rocks and Minerals: 77(5): 312. |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
Hanson Aggregates Inc. Plum Run Quarry, Peebles, Adams County, Ohio, USA