Oatland Complex. Extreme Basic Fades. X 20. 
The uralic augite crystal is seen enclosing small patches of pale fibrous hornblende. Compact 
hornblende almost surrounds the augite. Dusty felspathic matter occasionally with the outlines of 
plagioclase lies embedded in the pale green chloritised hornblende. An individual of oxidised biotite is 
by the circumference remote from the augite. 
( Photograph cii by IF. L. Carter.) 
Proc. Yorks. Geol. Soc, Vol. XVII., Plate X. 
