THE ILLINOIAN ICE INVASION 



323 



Possible correlation 



Character of deposit 



Feet Total 



Wisconsin till 1 



Wisconsin till 2 



Wisconsin till 



(Early) 3 



Wisconsin till 



(Early) 4 (Iowan?) 



Interglacial 



Land surface 

 Sangamon 

 (Scarboro beds ) 5 



Interglacial 



Scarboro beds 6 



Interglacial... 

 Don beds ? 

 Interglacial.. 

 (Sangamon) 

 Don beds ? 



Interglacial or glacial. 

 (Probably Ulinoian 

 till) 



Reddish clay with few pebbles and glaciated stones 



Rounded gravel (2 feet) over light brownish fine, sandy 

 loam, which is also calcareous (38 ft.) 



Small angular to rounded gravel mostly quartzite, in 

 red clay matrix, (4 feet) ; loam with gravel as above (10 

 feet) ; angular gravel with little clay binding (26 feet) ... . 



Bluish clayey sand with angular fragments (boring here 

 was rapid with admixture of recovered materials) 



Six inches of fine white sandy soil, deoxidized, with 

 twigs and a well preserved trunk of a northern white 

 spruce. It rests on a grayish clayey sand, which, when 

 the calcareous and ferruginous matter are removed, is 

 similar to the deoxidized soil above. Also contains 

 twigs 



Angular and subangular gravel, mostly quarztite, size 

 of peas, with some earthy binding materials in variable 

 layers. At 16 feet below the top was brown rusty sand 

 (indicating an interglacial surface) strongly magnetic. 

 At 15 feet the fragments were large, subangular at 

 base 



Loamy sand with quartzite pebbles, which at base are 

 rounded 



Very fine siliceous flour, somewhat calcareous, but very 

 rich in magnetic sand. Deposit held water, flowed up- 

 ward in casing for 8 feet, like cement, and stopped the 

 boring 



To more than : 



This is the level of the whirlpool but the drift may 

 continue for 50 or 100 feet, less or more 



40 40 



40 80 



40 120 



66 186 



34 220 



23 243 

 16 259 



Wi 268^ 

 24^ 293 



50 



Spencer refers the wood in stratum 5 to the Scarboro beds at Toronto 176 

 and this correlation appears to agree with the evidence. The above inter- 

 pretation of the well section strata may not be correct but it appears to be in 

 conformity with the evidence, as compared with the section at Toronto. Kin- 

 dle and Taylor 177 do not name the drift sheet beneath the Wisconsin, nor do 

 they discuss this well section. 



An interglacial fauna of possible Sangamon age has been observed at the 

 south end of Cayuga Lake. 17S This deposit is on the west shore of the lake, 

 "between Taughannock Falls and Frontenac Beach in a small ravine which 



176 Op. cit., p. 438. 



177 Niagara Folio, p. 9. 



178 Maury, Journ. Geo!., XVI, pp. 565-567. 



