THE LA URENTIAN PENEPLAIN 



619 



present in such an attitude that practically all the streams flow 

 against the dip of the rocks — a direction opposite to that nor- 

 mally found on a belted coastal plain — a modification in this case 

 apparently due to the uplift of the Cordilleran system on the west. 



Fig. I. — Sketch map of the Laurentian Peneplain and the country adjacent — • 

 south, southeast, and east of Hudson Bay. 



On the southeast side of the oldland the valley of the St. 

 Lawrence lies on a lowland cut on Paleozoic sediments, and 

 shows at the extreme west in the valley of the Ottawa River, and 

 at the east in the Miny-an Islands and the Island of Anticosti, 



