Plate IX. 



Banding by injection along the foliation planes. 

 Near Tiruppur in the Coimbatore district the outcrops of the charnockite series 

 are extremely well banded by alternation of felspathic and non-felspathic types. 

 The bands of the latter are sometimes seen to break across the foliation planes and 

 sometimes to bifurcate; they are thus, in all probability, later injections into the 

 felspathic rock, and, though generally following the foliation planes, have betrayed 

 their real nature by occasional departures from this rule. Banding caused by such 

 UUpar-lit injections is of a much more definite kind than that caused by the 

 deformation of schlieren (see pp. 183 and 223). 



