GEOCHEMISTRY OF THE UPPER CRETACEOUS SHALES FROM GOMBE FORMATION, GONGOLA BASIN, UPPER BENUE TROUGH, NIGERIA: IMPLICATIONS FOR PROVENANCE AND TECTONIC EVOLUTION. FJS [Internet]. 2024 Dec. 31 [cited 2025 Sep. 5];8(6):528-3. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/3013