40 
Th<i Aini'i'iv<()i (ieiilogii^t. 
Jniuiary, isns 
iiiii' nlojitr Smith souiid, sliould )»t*l<nii: to the snino system of up- 
heaval as tliat of the Canadian ri'oioii. 
Ka>l of tlic middle of Hudson liay Itelweeii tiie coast and 
(Mearwater hd<e. A. 1'. Ja)\v has found sediments and terraces 
l)rolialiiy of marine oriuin \\\\ to about (17.") feet al)ove sea level.* 
Southwest of .lames i)ay, on the KenoLiami river, a trilmtarv 
of the Alltaiiy. iJell i has found marine fossils al)out 4.")(l feet, 
and west of Hudson liay at Cliuicliill rixci' about !).")<l feet aliove 
tli.\ sea level. 
.\s is easily seen from the aliove statements, the observations 
at })iiscnl available do not allow the drawinii of even a})proxi- 
mate isobases over a large i)Oi1ion of the ai'ca: but from the part 
sulfici<'ntly studied, it seems possible to form a. genend idea con- 
cerninu' the nature of the changes of level: these point to a re- 
markalile analogy to the conditions in Scandinavia. Thus the 
greatest subsidence has taken j)lace in Labrador — probably near 
the watershed — where the ice accumulation had its centei'. Hut 
as the ice in the northern [)art of this land, according to Bell, 
had a noi'tliward movement, it will proliably ])c found that the 
amount of subsidence also deci'eases to that side, aliout as it did 
in all other diri-ctioiis in which the iee-t-()\('ring thinned out. 
The couformity between ice-load and sulisidenee seems to have 
Iteen still greatei' here than in Scandinavia, and in this respect it 
will lie \('r\' interesting to see what will result from a continued 
investigation of the warpi'd iieaches in the lake basin with its 
marked ice lobes. It can already lie seen that the isobases in the 
l)eninsula southeast of the St. Lawrence I'iver. which wt- will 
liere for brevity s sake call the Atlantic peninsuhi. follow very 
closely the extension of the last glaciation. Kspecially is it note- 
woi'thy that the amount of subsidence was small along the gulf 
of St. Lawi-cnee in connection with the fact, stated by Chalmers, 
that the ice thinneil out in that direction. 
Nova Scotia, which pi'obably only in its western ijortion ;ind to 
a small amount jtarticipated in the sidisidence of the mainland, 
seems not to have lieeii wholly ice-covered during the last glacia- 
tion. and the local glaciers might not haxc lieeii thick cncnigh to 
produce any n<)ticeable changes'of level. 
""•"Ivep. on e.vpl. in .Tame.-; Jlny and country east of Hudson J'>ay," 
Geol. and Nat. Hist. Surv. Can.. .\nii. rept.. J887, vol. iii., \). ■")!) .b 
+(;eol. and Nat. Hist. Surv. (an.. .\nn. rejjt.. i8.S(i. vol. ii., pp. 34, 
38 (i. 
