122 E. A. Daly — Mechanics of Igneous Intrusion. 



Fig. 3. Two views of the Shatter-zone, Columbia Eiver near Trail, B. C. 



Even in this small part of the batholith there is to be seen a 

 notewortliy variability in mineralogical composition. East, west 

 and south of Trail the rock is a gray, coarse-grained tonalite 

 with essential andesine, biotite, hornblende, orthoclase, and 



