14 



The section is divided into three parts corresponding to the 

 three working levels of the clay pit, and rises to the Iroquois 

 terrace. 



Resting on the shale there are three feet of boulder clay, 

 followed by from 14 to 17 feet of stratified materials, con- 

 sisting of a foot or two of bluish clay below and brown or 

 yellow sand with thinner clay beds above, the whole some- 

 what irregularly distributed probably by a river coming 

 into a lake 60 feet higher than lake Ontario at present. 



Interglacial Beds at Bend of Don River. 



This exposure is highly fossiliferous, some beds being 

 crowded with shells, while flattened trunks and branches of 

 trees often occur, and in one thin layer of clay, now run 

 out, many leaves of trees have been found. 



Ascending above this part of the section one must go 

 about 50 feet farther north to find its continuation. The 

 next bed is of blue clay 3^2 feet thick above which there 

 are five feet of yellow and brown sand, the last member 

 of the characteristic Don beds. The total thickness above 

 the lower boulder clay is from 23 to 25 feet. The brown 



