118 WHITE : OATLAND COMPLEX OF IGNEOUS ROCKS. 
The appearance of some individuals is here illustrated. 
Fig. 5. Fig. 6. 
In Fig. 3 the mineral is partially enclosed by green biotite, 
and its end is separated from the biotite by granular epidote 
with pleochroism greenish-yellow and j^ellowish-green. 
In some cases the green biotite encloses much similar epidote, 
and suggests that one mineral is wholly derived from the other. 
In other sections layers of green biotite alternate with brown 
layers of this mineral, the whole showing pleochroism in shades 
of green. The mineral is also intergrown with a bluish-green 
