ANORTHOSITE-GABBRO IN NORTHERN NEW YORK 43 
distinctly lenslike, up to a foot long. That the plagioclase-rich 
material was forced into the cracks in the form of dikes seems 
Fic. 6.—A portion of the remarkably fractured zone of anorthosite-gabbro with 
its dikes in the northern portion of the area. About fifteen rods north of the northern 
road. 
Fic. 7.—A local highly crushed portion of the prominent zone of fracturing in 
the anorthosite-gabbro. A few rods north of the northern road. 
almost certain. Contacts of the dikes against the anorthosite- 
gabbro are generally fairly sharp. On the north side of the photo- 
graphed locality (see left side of Fig. 6) a good many very small 
