SUPERFICIAL GEOLOGY OF DUNDAS VALLEY. 



127 



E to S 79 E are given. These two directions are the outside mark- 

 ings of a series, and would apparently show a divergence of a consid- 

 erable amount. 



In a list of ice markings given on page 891 of the Geology of 

 Canada, we find the following directions of striae in the neighbor- 

 hood of Dundas valley : — 



LOCALITY. 



LATITUDE. 



LONGITUDE. 



DIRECTION. 



Brant 



44.12 



44-35 

 44-32 



43 - r 9 



43.20 



43-15 

 43.18 



43- J 9 

 43.21 

 43.16 

 43.16 

 43-15 

 43-15 



81.13 

 80.52 



80.55 

 80. 14 

 80.13 

 80. 12 

 80.13 

 80. IO 

 80. 2 

 80. I 

 80. I 

 79-56 

 76-59 



S IO W 



Syndenham 



S 12 W 



(C 



S23W 

 S46E 

 S72E 

 S76E 

 S59E 

 S79E 

 S49E 



S74 w 

 S24 w 

 S71 w 



S59W 



" near Sheffield 



" near Troy 



« 



u 



West Flamboro 



J~ /other grooves\ 



do. ......'. 



Ancaster 



a 



Barton 



York, Grand River 



43.02 



43 ° 2 



S68E 



Comparing the several directions of these striae, one would be 

 inclined to draw the inference that the ice coming from the North- 

 East passed into the valley in currents, met near the narrow part of 

 the valley, forced itself through the gorge into the Township of Bever- 

 ley and the western part of Ancaster Township, and spread over the 

 country on its way to the South-West. 



What effect the glaciers leaving these marks had upon the form, 

 ation of the valley, is not so apparent. The question might naturally 

 be asked, are these ice markings the result of a first or second glacial 

 period ? That is a question that I cannot very well answer, as some 

 of these markings I have not seen. Some of them I would unhesi- 

 tatingly ascribe to the one period and some to another ; whether these 

 periods were first, or second, or third, or fourth, I do not know. 



If we take the Township of West Flamboro' as an instance, we 

 have, in one place, no less than three sets of markings, running in as 

 many different directions. These are S 74 W., S 69 W., and S 24 

 West. From the generally level appearance of this situation, it could 



