68 



J. \Y. SPENCEB — IIKill CONTINENTAL ELEVATION. 



it. Although this ancient valley is over sixty miles wide at its mouth and 

 was a narrow channel, yet it is not as hroad as some portions of the modern 



called river. The breadth of the submerged valley throughout it- wind- 

 in-- tor a Length of sot) miles or more, is remarkably regular, only gradually 

 increasing it- magnitude in passing seaward. Other and lesser channels are 

 visible in the soundings : thus, Bouth of the Straits of < 'anso, between Nova 



»tia and < ape Breton island, there i- one 1,200 feel <l<\<, according to tin- 



