166 GLACIAL SUCCESSION IN CENTRAL LUNENBURG—PREST. 
general course of the striz on the highlands around, is about 
S. 45° E., while the course of the valley in which the lode lies is 
about 8. 50° E. 
At Dorey’s Brook, a thin bed of partly oxidized boulder clay 
containing granite and other northern drift, laid on the bed 
rock; while in the layers above, granite was absent. A large 
morraine, 24 miles southeast of Dorey’s Brook, contains much 
northern drift, with quartz, easily recognized as coming from a 
vein a little east of the brook. Their travelled course was about 
S. 40° E. The lower till, where covered by an upper layer of 
later origin, is but shghtly oxidized, and in some places not at 
all; but this is probably owing to subsequent denudation, I 
have not been able to divide the till of the northern part of this 
district into an earlier and later deposit. The inference from 
this seems to be, that the next interglacial recession did not reach 
to the northern part of the area under discussion. A single 
deposit would there include what is represented further south 
by the deposits of two apparently distinct glacial epochs separ- 
ated by a short interglacial period. 
Second Interglacial Epoch. 
This should be classed as a shght re-cession of the glaciers, 
rather than an interglacial epoch. The evidence at hand seems 
to indicate that while there was a re-cession of the ice at Block- 
house, it did not retire as far north as the granite, or even as far 
as the next quartzite belt, two or three miles distant. However, 
in its effect upon the purpose of my work, viz., the discovery of 
a gold bearing vein, it was adequate to an ordinary interglacial 
epoch, as it divided the drift into two portions, differing in 
character, condition of contents, and in the course traversed by 
it. The deposits belonging to this epoch consist, at Blockhouse, 
of red and yellow ochreous clay, (see section 2); finely stratified 
sand, (section 3); thin bed of bog iron, (section 4). 
At Dorey’s Brook are various coloured clays underlaid and 
overlaid by unstratified drift (see section). The overlying drift 
in all these sections is of local, and the underlying drift chiefly 
