126 



table of formations will therefore surely need emendation. 

 Nevertheless, it will serve to give a picture of the leading 

 stratigraphic inferences so far made and to indicate in a 

 qualitative way the magnitude and variety of the forma- 

 tions composing the Shuswap series. 



o 



Metres 



2 3 



Diagram showing metasedimentary schists, thin limestone interbeds, and intrusive 



sills (left blank) of the Shuswap terrane, in typical relations; locality near 



Carlin siding. 



Orthogneisses and Intrusive Granites. — Without 

 exception each member of the Shuswap series has been 

 intruded by granitic magma of pre-Beltian age. Some 

 of the largest of these intrusive bodies are true cross- 

 cutting batholiths which have developed strong meta- 

 morphic aureoles. However, most of the intrusions, liter- 

 ally innumerable, are not subjacent or bottomless but 

 are to be classed with the 'injected' bodies. Sills are 

 specially conspicuous. Some of the injections are thick 

 and apparently of laccolithic form and mechanism; others 

 have roofs and floors, but cross-cut the bedded formations 

 and these may be described as chonoliths. Dykes are 



