Dolomite from selected localities.
USA | |
| The Mineralogy of The Butte District, Montana; Guilbert and Zeihen 1964 |
John M. Guilbert and Lester G. Zeihen (1964). The Mineralogy of the Butte District, Montana. Pg. 6-7, Table 3-2. Siderite and Dolomite both appear rarely in the Intermediate Zone of the Butte District. |