Ostracods from the yola arm, Upper Benue Trough, Nigeria

A total of nine genera of ostracods from the Yola Arm in the north-east of Nigeria are described. The various species, though from outcrop sections, supplement the list from the Upper Benue Trough already reported from Ashaka quarry and borehole (BH 2340) of the Gongila and Pindiga Formations respectively. The species described belong to six families namely; Brachicytheridae, Bythocytheridae, Cyprididae, Trachyleberididae, Cytherideidae and Cytherellidae. Some of the species are evidence of faunal dispersion during the Mid-Cretaceous marine transgression of the North and West African basins. Keywords: biostratigraphy, systematics, ostracod, taxonomyGlobal Journal of Geological Sciences Vol. 3(2) 2005: 179-18

Ostracod biostratigraphy and paleoecology of the Dukul formation in the yola arm the upper Benue trough, North-eastern Nigeria

No Abstract. Global Journal of Geological Sciences Vol. 4(1) 2006: 39-4

Trace fossils from the Turonia Dukul and Jessu Formations in the Yola arm, upper Benue trough, northerneastern Nigeria

No Abstract

Trace fossils from the turonian dukul and jessu formations in the yola arm of the upper Benue trough, ne Nigeria.

The trace fossils Thalassinoides sp., Planolites sp. and Chondrites sp. are described from the Dukul and Jessu Formations in the Yola Arm of the upper Benue Trough. Thalassinoides sp. from the Dukul Formation occurs on the undersurfaces of marlstone and limestone beds.These units are dark gray in colour and contain sparse glauconite grains. The Jessu Formation contains networking Thalassinoides sp., horinzontal Planolites and branching Chondrites from micaceous and carbonaceous siltstones and fine grained sandstones. These trace fossil species belong to the Cruziana ichnofacies. The lithofacies characteristics, body fossils and the presence of the Thalassinoides sp. indicate that the Dukul Formation was deposited in a low energy oxygen- deficient open marine (mid-outer shelf) environment. The Jessu Formation was deposited in the mid-shelf to lower shoreface environment. Journal of Mining and Geology Vol. 43 (2) 2007: pp. 187-19

Petrographic studies and coking properties of Lamza, Chikila and Lafia-Ori coals of the Benue trough

No Abstract.Journal of Mining and Geology Vol. 44 (1) 2008: pp. 37-4