1892.] 
473 
[De Geer. 
along Smith Sound, should belong to the same system of up- 
heaval as that of the Canadian region. 
East of the middle of Hudson Bay between the coast and 
Clearwater Lake, A. P. Low has found sediments and terraces 
probably of marine origin up to about 675 feet above sea level. 1 
Southwest of James’ Bay, on the Kenogami River, a tributary 
of the Albany, Bell 2 has found marine fossils about 450 feet, and 
west of Hudson Bay at Churchill River about 350 feet above the 
sea level. 
As is easily seen from the above statements, the observations 
at present available do not allow the drawing of even approximate 
isobases over a large portion of the area ; but from the part suffi- 
ciently studied, it seems possible to form a general idea concern- 
ing the nature of the changes of level ; these point to a remark- 
able analogy to the conditions in Scandinavia. Thus the 
greatest subsidence has taken place in Labrador — probably near 
the watershed — where the ice accumulation had its center. But 
as the ice in the northern part of this land, according to Bell, had 
a northward movement, it will probably be found that . the 
amount of subsidence also decreases to that side, about as it did 
in all other directions in which the ice covering thinned out. 
The conformity between ice-load and subsidence seems to have 
been still greater here than in Scandinavia, and in this respect it 
will be very interesting to see what will result from a continued 
investigation of the warped beaches in the lake basin with its 
marked ice lobes. It can already be seen that the isobases in 
the peninsula southeast of the St. Lawrence River, which we 
will here for brevity’s sake call the Atlantic peninsula, follow very 
closely the extension of the last glaciation. Especially is it note 
worthy that the amount of subsidence was small along the 
Gulf of St. Lawrence in connection with the fact, stated by 
Chalmers, that the ice thinned out in that direction. 
Nova Scotia, which probably only in its western portion and to 
a small amount participated in the subsidence of the mainland, 
seems from this fact not to have been wholly ice-covered during 
the last glaciation, and the local glaciers might not have been 
thick enough to produce any noticeable changes of level. 
1 Rep. on expl. in James’ Bay and country east of Hudson Bay. Geol. and nat. 
hist. surv. Can., Ann.rept., 1887, III, p. 59 J. 
2 Geol. and nat. hist. surv. Can., Ann. rept., 1886, II, pp. 34, 38 G. 
