1906.] 



SEE— THE CAUSE OF EARTHQUAKES. 



335 



ft} 



3 



valleys now occupied by the Ganges and Bramaputra that these 

 mighty mountains were upheaved. In this process there would 

 naturally be certain paths or outlets under the crust, along which 

 the lava would escape most easily ; and these outlets would depend 

 upon the upheaval of the overlying strata. A break in the strata 

 perpendicular to the direction of the chain would develop into a 



