Montmorillonite from West Africa
Niger | |
| www.cnncintl.com (2015) http://www.cnncintl.com/php-bin/upload/Document/86bbe4ef8593f62526ca69ffa151bc6f.pdf |
Senegal | |
| www.uoguelph.ca (2003) http://www.uoguelph.ca/~geology/rocks_for_crops/45senegal.PDF |
Niger | |
| www.cnncintl.com (2015) http://www.cnncintl.com/php-bin/upload/Document/86bbe4ef8593f62526ca69ffa151bc6f.pdf |
Senegal | |
| www.uoguelph.ca (2003) http://www.uoguelph.ca/~geology/rocks_for_crops/45senegal.PDF |