Migmatitic gnesis outcrop at old Wowyen hill gnarry along Nassaraw -Eggon showing quartzo- felds pathic vein and syncline/anticline

The outcrop is along Akwanga – Lafia road and the outcrop is called Woyen quarry site. The outcrop is made up of granite gneiss and migmatite gneiss.

        Band gneiss is observed and it confirmed complete differentiation. Other bands are felsic band and they compose of

quartz and feldspar bands that can hardly weather and gneiss bands composed mafic minerals.

        The structures seen here are quartz veins and they are cross-cutting each other and a well defined foliation was observed due to differentiation of the mineral.

        Foliation is confirmed to be the older structure in the environment.

        The trends of foliation are as follows

        N16^o -N195^o, N22^o -N201^o, N28^o-N208^o

N20^o -N250^o 

     Thickness of quartz vein

(1) 4cm (2) 1.0cm   (3)   4.5cm

Trend:

Strike                       N165- N45

Dip direction            111 SE

Dip amount             27⁰

 

The G.P.S Reading

Latitude                            08^o 49'.45"N

Longitude                 08^o 29' 87"E

Elevation                 239M

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