Francevillite from Sahara Desert, North Africa
Mauritania | |
| Mauritanian Geological Survey (1995) database |
Mauritanian Geological Survey (1995) database | |
| Mauritanian Geological Survey (1995) database |
Niger | |
| J. P. le Roux and P. D. Toens (1987) in Gondwana six: stratigraphy, sedimentology, and paleontology, Volume 2 edited by Garry D. MacKenzie American Geophysical Union pp 139-146 |