358 A. P. COLEMAN — IROQUOIS BEACH IN ONTARIO 



for a time, of lake Algonquin, before the uplift to the northeast sent its 

 waters round by Niagara falls. It may be, however, that Niagara falls 

 began while lake Peterboro and the Rice Lake bay of Iroquois were still 

 ice covered, and that the drainage of lake Algonquin through lake Peter- 

 boro came after Niagara falls had been in existence for some time. The 

 Trent Valley canal, now under construction by the Canadian govern- 

 ment, will, in a sense, renew this ancient connection between the upper 

 and lower lake. 



Beach Levels on the north Shore of Lake Iroquois* 



tt, . Miles north 



reel. 20 degrees east 



Hamilton : 116 



Waterdown 123 % 



Cooksville (Spencer) 154 25J 



Toronto junction (1 mile west, at 32, the bar reaches 179) 176 33 



Leaside (Canadian Pacific railroad just east of Toronto) 188 36 



York (Grand Trunk railroad just east of Toronto) 186 36J 



York (a mile southeast, measured from lake Ontario) 196 37 



Kingston road (Spencer) 213 42J 



Quays siding (north of Port Hope) 311 72 



North of Colborne (Spencer) 356 79£ 



Silver lake (northeast of Colborne) 360 (aneroid) 388 81 



Northwest of Trenton (374), 386, 441, (450) 89* 



Oak Hill lake 414, 430, 461 100J 



Southwest of Havelock 436 102 



Island west of Madoc junction 450,460,475 102J 



Island north of Campbellford 432, 442, 475 103 



(Gilbert puts highest beach 90 feet above lowest = 522.) 



Island near West Huntingdon , (440), 492, 498 108 



The elevations at Toronto junction, southeast of York and northwest 

 of Trenton, were determined with a surveyor's level; the others, where 

 not otherwise noted, were determined by hand level from known points. 

 Levels inclosed in parentheses are more or less doubtful. In all cases 

 the levels given are from the top of gravel bars, probably on the average 

 5 feet above the usual water level. 



Iroquois Beach, in New York State 



Within the bounds of New York state the Iroquois beach has been 

 traced mainly by Doctor Gilbert,t but the region has been worked over 

 partly by Professor Fairchild also, who examined specially the beaches 



* All elevations are above lake Ontario. 



f Sixth Ann. Rept., State Reservation at Niagara, 1888-1889, pp. 67-71. 



