Argillaceous limestone from USA
USA | |
| Litton, A (1855) Preliminary report on principal mines in Franklin, Jefferson, Washington, St. Francois, and Madison Cos., Missouri: Missouri Geological Survey, First and Second Annual Reports., part 2, 30-31. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Benbrook Lake area, Fort Worth, Tarrant County, Texas, USA