Nontronite from Northern Cape, South Africa
South Africa | |
| Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University). |
Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, Linden . | |
| Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, Linden . |