PLATE III 



PYBOXENITE AND DIORITE 



Fig. 1. Rounded form of olivine pyroxenite outcrop at Chase Corners, caused 

 by the weathering of the olivine. This rock is never found in roches 

 moutotm^es, as are the other rocks of the series 



Fig. 2. Stringers of Quart?. Srhist in Diorite, Buchanan 



