Montmorillonite from selected localities.
USA | |
| MinRec 15:5 |
| Hall, Wayne Everett & Edward M. Mackevett (1963), Geology and ore deposits of the Darwin quadrangle, Inyo County, California: USGS PP 368: 63; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 439. |