“GEOCHEMISTRY OF THE UPPER CRETACEOUS SHALES FROM GOMBE FORMATION, GONGOLA BASIN, UPPER BENUE TROUGH, NIGERIA: IMPLICATIONS FOR PROVENANCE AND TECTONIC EVOLUTION” (2024) FUDMA JOURNAL OF SCIENCES, 8(6), pp. 528–538. doi:10.33003/fjs-2024-0806-3013.