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SYMPOSIUM PHOTO INTERPRETATION, DELFT 1962 
Stereopair - Granites and G 2 , permeation gneiss Pg, and metasediments Ms, Zungeru 
Sheet, Nigeria 
The permeation gneiss is similar to that of fig. 4, and the direction of banding is indicated 
by streaks on the tops of larger outcrops and by the direction of elongation of the smaller 
outcrops. The banding remains constantly parallel to the relic bedding of the adjacent meta 
sediments (lineaments 1 and 2). 
The lineaments within the granite G x (3) are not parallel to the relic bedding lineaments of the 
adjacent metasediments (4) and thus this granite is unlikely to be of autochthonous origin. 
Lineament 5 within the metasediments is transverse to the relic bedding and is probably a 
joint; as this lineament is parallel to those within the granite G l5 it is probable that the granite 
lineaments are also joints. 
At 1 the relic bedding lineaments diverge around the granite G x and appear to have been 
pushed apart. Granite G x is therefore probably of intrusive origin. 
Granite G 2 does not possess the same lineaments as G x and the aerial photographs therefore 
suggest a possible subdivision of this probable intrusion.