Ironstone from Sahara Desert, North Africa
Algeria | |
| www.portergeo.com.au (2007) http://www.portergeo.com.au/database/mineinfo.asp?mineid=mn1027 |
Mauritania | |
| Kolb, Jochen & Petrov, Nikolay. (2015). The Guelb Moghrein Cu–Au deposit: Neoarchaean hydrothermal sulfide mineralization in carbonate-facies iron formation. Ore Geology Reviews. 78. 10.1016/j.oregeorev.2015.09.003. |