 | Van Alstine, R. E., Worl, R.G., Heyl, A.V., Trace, R.D., Parker, R.L., Griffitts, W.R., Sainsbury, C.L., Cathcart, J.B. (1976) Geology and resources of fluorine in the United States. Professional Paper 933. US Geological Survey doi:10.3133/pp933 | Report (issue) | | Palmer, Mich. 6. Ribbon asbestos ore, Quebec, Canada 7. Manganese ore, banded rhodochrosite 8 . Aluminum...Survey in accordance with the provisions of the Mining and Minerals Policy Act of 1970 (Public Law 91-631...discovered or not currently profitable to mine. The mining of mineral deposits, once they are discovered,...depleted, new deposits are found, new extractive technology and uses are developed, and new geologic knowledge...knowledge and theories indicate new areas favorable for exploration. This Professional Paper discusses |
|
