I 



CORRELATIOX OF THE DRIFT 439 



miles to the south of Niagara. Overlying these beds are others containing 

 a flora belonging at present to a belt 200 miles to the north. These occur 

 up to an elevation of 150 feet above Lake Ontario.^^ The fossiliferous 

 beds of both series have been named the Toronto formation by Prof. T. C. 

 Chamberlin. In correlating the fossiliferous beds with the Pleistocene 

 series of the west, Prof. Prank Leverett provisionally thinks that they are 

 newer than the Illinoisan till. 



My original measurements of the height of the Iroquois beach just east 

 of Scarboro Heights and those at the mouth of Niagara Eiver show that 

 the post-Iroquois warping amounts to 75 feet ; so that, although the Forest 

 Glen deposit occurs at 154 feet above the present lake level, with its cor- 

 relative back of Toronto at 150 feet, there was an actual difference in 

 height of 79 feet before the warping, but the land surface of the two 

 localities probably varied. 



The cool climate beds at Scarboro Heights were dissected by a deep 

 glen, as first pointed out by Hinde, similar to that of the reopened Whirl- 

 pool-Saint Davids Valley, before the accumulation of the succeeding 

 Pleistocene deposits, and the phases of erosion and climate are identical 

 in the two localities. Indeed, the amount of erosion was very great. 

 There has been found nothing of similar magnitude on the two sides of 

 the lake. For this epoch of land erosion in the Ontario basin, which 

 would seem to be post-Illinoisan, I apply the name of Forest Glen. This 

 section substantially adds to our knowledge of the Glacial period in the 

 Ontario Valley. The drift below the Forest Glen seems to fill a hiatus 

 between the beds of colder and warmer climate at Toronto, while the 

 warmer beds mentioned should only occur in the Magara district below 

 lake level, the recent tilting of the land causing the flooding of this region. 



Whether the upper series of till above the Forest Glen and those at 

 Toronto are merely alternations of the lowan and earlier stages of the 

 Wisconsin drift in this region or not, will be left to others to investigate, 

 but the whole series shows that a very nearly complete succession of glacial 

 deposits, except the late Wisconsin, was accumulated in the Magara dis- 

 trict before the birth of the river, which cuts through the most recent till 

 of the region. 



^ Summary 



In the borings made in the Whirlpool-Saint Davids Channel, there have 

 been discovered the remains of a cool climate forest and soil at a depth of 

 186 feet below the surface, with the proof of three or four glacial forma- 

 tions since that time, like the Pleistocene series at Toronto. Before that 



»LoccIt. 



