Glaciation of Eastern Canada. 325 
divergent courses of striz, often seen’ upon the same rock 
surface, are, however, sometimes explicable on the theory of 
their having been produced by successive portions of the 
diminishing glaciers conforming, in their motions, more 
closely to the surface features during the period of melting. 
Along valleys, which were under the sea during the latter 
part of that period, as, for instance, those of the Petitcodiac 
and Kennebeckasis rivers, the striz, which in some cases 
are parallel thereto, may have been produced by floating 
ice, and the same remark applies to strie met with on the 
isthmus of Chiegnecto.’ Certain fine ice markings, found 
also on the immediate coast of the Baie des Chaleurs, seem 
attributable to the same cause. _It is probable that during 
the ice age the eastern part of this bay, at least, was open, 
and that floating ice grated the rocks along its shores. 
. Princk Epwarp ISLAND. 
Prince Edward Island has probably been glaciated 
similarly to the coastal areas of New Brunswick and Nova 
Scotia. Sir William Dawson gives the courses of striz 
observed in two places; but it is an open question whether 
local glaciers of its own or icebergs produced them.’ Other 
phenomena noted by Sir William rather point to the latter 
as the probable cause of these. 
QUEBEC. 
The glaciation of the Province of Quebec presents much 
greater complexities than are to be found in that of the 
Maritime Provinces of Canada. It would seem that the 
estuarine portion of the St. Lawrence River, at least, was 
partially open during the period of extreme cold, similarly 
to the Baie des Chaleurs, as just stated. The Notre Dame 
range of mountains, or the water-shed adjacent thereto, shed 
the ice northward and southward, part of which debouched 
into these waters. Observations made by Dr. R. W. Ells 
‘Annual Report, Geol. Surv. of Can., 1885, Vol. I, part GG.; list of 
striz. 
*Supplement to Acadian Geology, p. 25. 
