NOTES ON THE LATE COLLECTING SEASON 



one imbedded which I extracted close by three years ago, 

 and which furnished me with a well-preserved Ohio lyamelli 

 branch (Orthodesma curvata). Visiting this particular 

 place, I ascertained the bank nearly up to the fence had 

 disappeared since examined last year. During a close study 

 of the locality for several summers, I never noticed before 

 such a rapid encroachment as tiie water of Ontario has 

 made there on the land. Indeed, I felt inclined to think 

 that the slow rise of the northern shore may have increased 

 recently. While he never questioned the proved conclusions 

 of the professional men, the writer never for a moment im- 

 agined that the few isolated patches still remaining of 

 glacial clay could have produced more than a small portion 

 perhaps of the sands, shingle, etc. 



We all know this deposit underlies Burlington Heights, 

 the ancient Lake Iroquois Beach, and no doubt the large 

 volume of water v/liich formerly rushed down by Albion 

 Mills, Stoney Creek, Grimsby, etc., conveyed a considerable 

 portion of the material which contributed to build that vast 

 accumulation known to us as the Burlington Heights. 



We may be unable to state positively how far the 

 glacial clay extended into Lake Ontario, but one thing may 

 be safely asserted, for thousands of years its waters have 

 been battering away at the clay cliffs on its southern shore, 

 combing out an.d spreading broadcast all the land ice 

 brought from the north, and what a vast collection of 

 igneous rocks, of granites, feldspars, green stones, accom- 

 panied it. Some years since the wniter, while hunting for 

 Indian relics at Lake Medad, noticed an erratic boulder 

 there of Jaspar conglomerate, and on showing a fragment 

 to a Canadian gentleman, he quietly remarked, '^ You will 

 find that rock in situ to the north of Lake Huron, and I 

 have seen it there." So it must have crossed the frozen 

 lake if confined to this locality. Your collector considered 

 it unnecessar}^ to extract more than a few Archaean speci- 

 mens from the glacial drift, since he has submitted already 



