724 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



of abyssally injected bodies of basalt. The smaller injected masses of Group A 

 in the classification are explained as, either direct offshoots from the abyssal 

 basaltic injections, or as satellites from the secondary magma developed in 

 batholithic chambers. In brief, batholiths appear to represent abyssally injected 

 bodies of such size and original temperature as to be capable of assimilating 

 large volumes of the primary acid shell and, on occasion, notable amounts of 

 the overlying sediments. 



