GLACIAL SUCCESSION IN CENTRAL LUNENBURG PREST. 165 



its tributaries, and the consequent draining of the watershed at 

 Rhodenizer's Lake, would have prevented the formation of the 

 kame. If, as is maintained, this was near the southern limit of 

 glacial extension, then the deep valleys to the east and west of 

 this tableland would influence the course and lessen the eroding 

 power of the thinned-out extremity of the last glacier. The 

 complete removal of a kame on a watershed would then be 

 extremely doubtful. Again, the formation of interglacial kames 

 was but the natural result of influences then in operation. The 

 retention of interglacial , as well as pre-glacial deposits, while 

 being over -ridden by glaciers, was also but a common occur- 

 rence.* River terraces must also have been formed from the 

 debris resulting from the re-excavation of the Lahave in this 

 epoch. But whether their remains are represented by the 

 deposits on the river east and south of Bridgewater, I had no 

 time to attempt to decide. 



Second Glacial Epoch. 



To this period probably belongs the lower till of Blockhouse 

 and Dorey's Brook, and the morraines surrounding them. It is 

 seen filling the re-excavated valley of the Lahave at tide level, 

 without having been there modified to any noteworthy extent. 

 At Blockhouse it underlies the auriferous drift, and at Dorey's 

 Brook it is seen beneath the interglacial clays and upper or 

 auriferous beds, which last are of local origin. This lower till 

 contains trap, granite, diorite, slate and quartzite. These rocks 

 are sometimes much worn, but are generally semi-angular and 

 easily distinguished from the rounded and polished pebbles 

 included among them, and which were evidently eroded from 

 some earlier deposit. It is but slightly oxidized where it is 

 covered by the upper auriferous drift, showing that no very 

 long time elapsed between the deposition of those two deposits. 

 The course travelled by the drift, from the lode at Blockhouse 

 was about S. 22 E. This may be a local deflection, as the 



* Chalmer's Report on the Surface Geology of Eastern Ne\tf Brunswick, 1895, page 

 47 ; M. also, Acadian Geology, 2nd ed., page 68. 



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