The Gboko Limestone, Yandev, Benue State, Nigeria: Geology, Geochemistry and Industrial Potentials. Anuba Basil Ofulume, Sabinus. An overview of the geology and hydrogeology of Nigeria . The geology of Nigeria, as detailed in Kogbe (), is made up of three main rock. Buy Geology of Nigeria. by C. A. Kogbe (ISBN:) from Amazon’s Book Store. Everyday low prices and free delivery on eligible orders.

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Cretaceous Sedimentary oolitic iron deposits around Agbaja, Kotoukarfi and Nsude areas. The formation consists of cross-bedded, coarse grained feldsparthic sandstones, occasional conglomerates, and bands of shales and limestones towards the top.

The shales contain significant amount of organic matter and may be a potential source for the hydrocarbons in the northern part of the Niger Delta Reijers and Nwajide, The reported occurrence of the foraminifera Eponides pseudoelevatus Graham et al. An approximation to this description are the dark, carbonaceous shales within the Bima Sandstone in the section along the river channel to the south of the bridge, mm just before the village of Bambam.

When the MgO is high it becomes dolomitic. Argillaceous units predominate in the central parts of the basin. However, in some parts of the east and many areas near the coast, the high rainfall has led to badly leached soils and severe erosion in some places.

The sedimentary rock in this area is sandstone. Outcrops and sections of the Lafia Formation occur in and around the town of Lafia, and along the bank of River Amba on the Lafia — Doma road. The name field is required. Soils with a high base saturation under forest vegetation Semi-arid tropics — Alfiso ls, Inceptisols, Gleysols and Cambisols.

All the other formations have their type localities in the villages named after them. Soils with a high base saturation under savanna nigerka grassland — Alfisols, Inceptisols, Vertisols, Cambisols. Those engaged in field geology investigate rocks and rock materials in their natural environment. The oxide facies which is represented by the silica iron oxide assemblage, is the most wide spread of the iron formation facies.


Thus the data available from both the Ojo-1 and Araromi-1 Boreholes indicate that the age of the formation is Campanian to late Paleocene.

These are thought to have been depositied in a braided alluvial fan setting. These sandstones are well sorted, quartz arenite that are commonly interbedded with siltstones and claystones and similar in part to the lithologies of the Patti and Enagi Formations.

In the Azara barytes fields, the dips are generally low with a range, 5o to 20o. It is interfaced at depth with the boreholes.

Geology of Nigeria (Book, ) []

The shale is known as the Ahoko shale with the type locality known as Ahoko. However, Petters reported on the occurrence of some diversiy arenaceous foraminifera from clayey interval of the Lokoja Formation indicating some shallow marine influence.

According to Okosunthe Neocomian Valanginian age proposed for the lower sediments referable to the Abeokuta Formation in Ise-2 Borehole by Omatsola and Adegoke required further studies and clarification.

The geochemistry of the amphibolite complexes within the schist belts has also led to controversy. Formations was therefore discontinued and replaced by the Abeokuta Formation which has priority of publication and a wider accepted usage. Late tectonic emplacement of granites and granodiorites and associated contact metamorphism accompanied the end stages of this last deformation.

There is also radial arrangement of the rock at the base of the outcrop joints, cross-cutting. Offshore, a 1, m thick sequence consisting of sandstones followed by black fossiliferous shales towards the top has been reported.

It is highly foliated and jointed. The sequence in the northern zone consists of a basal sand that progressively grades into clay beds with intercalations of lignite and shales. Some interesting field evidence points to the probability of the occurrence of dome structures in the brine bearing sediments.

The occurrence of the foraminifera Bolivina afra, Buliminella quadrilobata, Gabonita spinosa, Rugoglobigerina sp. The Cretaceous is divisible into two geographic zones, north and south.

Olade and EluezeOgezi and Ajibade have favoured dominantly ensialic processes in the evolution of the schist belts while AjayiRahaman and Egbuniwe have stressed that some include oceanic materials with tholeiitic affinities. The Lafia-Obi deposit has estimated reserve of The filtrate is then put on fire, where the water is allowed to dry leaving behind salt crystals.


InFalconer did geological mapping of Nigeria. There is a ridge which is very extensive. Open Journal of GeologyVol. Keana formation was thought to be the Muri sandstone correlated with the Bima sandstone in the upper Benue.

Geology of Nigeria

Ekiti, Kaduna, Kogi, Niger 8. The formation is made up of bluish-grey to dark-black carbonaceous shales, calcareous shales, shaley limestones, limestones, sandstones, siltones, and coal seams. This zone is confronted with multiple nutrient problems such yeology soil acidity, high exchangeable Al, very low exchangeable bases, and available micronutrie nts.

It follows the August break and lasts from September to October. Felsic dykes that are associated with Pan African granitoids on the terrain such as the muscovite, tourmaline and beryl bearing pegmatites, microgranites, aplites and syenite dykes Dada, b.

Almost everywhere these rhyolitic rocks directly overlie the metamorphic basement, which means that the younger granites if emplaced in uplifted areas that were undergoing erosion. In the electrical industry, it is used for conduits, sockets, insulator s and switches. The southern zone has a more complicated stratigraphy with limestone and marl beds constituting the major facies. It was assumed to present a certain affinity with the basic members of the charnockitic series of the Ivory Coast.

At Agbabu, there is no bitumen seeping at the surface.

All maps in this write-up was digitized by the first author and all pictures taken by both authors on field. For many centuries it one of the most important metals produced by man. The Jos plateau, that is located close to the centre of the country rises to m at Sphere hill and 1, at Wadi Hill.

The Gboko limestone can be correlated to the Jangerigeri limestone in terms of age and environment of deposition.