144 DRAINAGE BLACK AND GASPEREAU RIVERS CHURCHILL 



After re-elevation of the country, owing to the increased 

 grade of the rivers, vast quantities of glacial material must have 

 been swept into the sea, thus helping to build up our modern 

 marine marshes. 



The topography of this region, I believe, is all pre-glacial, the 

 small mounds of gravel and the gentle slopes of the hills to the 

 north, have been more or less shaped by the ice sheet that has 

 now vanished. 



