GEOCHEMICAL PROXIES FROM CLAYS IN PARTS OF NORTHERN NIGER DELTA: IMPLICATION FOR UNRAVELLING PALEOWEATHERING AND PALEO-REDOX CONDITIONS. FJST [Internet]. 31 mars 2020 [cité 17 mai 2026];6(1):6-14. Disponible sur: https://lafiascijournals.org.ng/index.php/fjst/article/view/161