446 Spencer — Deformation of Iroquois Beach and 



rocks, especially when interrupted by islands, the benches 

 become less conspicuous than when excavated out of limestones, 

 or they may become very obscure. Still, upon the flanks of 

 the Adirondack Mountains, the Iroquois Beach can be followed 

 and identified by the remains of barrier ridges, terraces, bowlder- 

 pavements, benches,, and above all by the occurrence of spits 

 across old valleys. 



Combining the surveys of Mr. Gilbert and the writer, the 

 position of the Iroquois Beach is shown on the accompanying 

 map. 



Asle 1 >■:• / » V 





OgdznsTiilrtf 





LAKE IROQUOIS 



! Cayue. 



The following table gives the elevation at salient points 

 along the Iroquois Beach. The elevations given are those of 



Feet above the sea. 



Lake Ontario, surface of 247 (TJ. S. Lake Survey)- 



Hamilton 363 (Spencer). 



Burlington Heights 355 



Waterdown Station 365 



Cooksville Station, about 400 



Carlton Station 417 



Kingston Road, crossing railway 1 2 miles east of Toronto, 459 



Whitby. 6 miles north of lake, near 507 



Colborne Station, 2 miles north of 602 



Trenton Station, t\ miles north of 682 



Lewiston, N. T. 385 (Gilbert). 



Rochester, " 436 



Canastota, " 441 



Cleveland, "' 484 



Constantia, " 489 



Richland, " 563 



Adams Centre 657 



Prospect .Farm, 4 miles east of Watertown 730 (Spencer). 



Natural Bridge 829 



East Pitcairn, one mile northeast of 942 " 



Fine 972 ''' 



