334 LIFE OF THE PLEISTOCENE 



Illinoian till. 6. Boulder clay, usually a thin sheet. 



7. Decomposed rock in situ. 



8. Surface of fundamental rock. 



The Iowan till does not appear to be present in this part of the country. 

 The following fossils have been secured from number 5 of the section. 



Campeloma species 

 Succinea obliqua ( = oval is) 

 Polygyra thyroides 



In the vicinity of Lake Simcoe, Ontario, two till sheets occur, separated by 

 stratified sand, gravels, and clays. The lower till is only exposed in the beds of 

 streams where it is seen to be composed of hard, compact sandy clay till without 

 stratification and with polished and striated boulders. Some of the best sec- 

 tions are in the bed of Lovers Creek, about one mile east of Allendale. The 

 upper till in places forms but a thin veneer over the interglacial sands and 

 gravels. 191 



On the Hudson Bay slope interglacial deposits occur on Moose River, 

 fifty miles from the mouth, and at the foot of Long Portage, Missinabi River, a 

 tributary of the Moose. The first deposits are lignitic, the second coarse peat. 

 Penhallow 192 records the following plants from these strata. 193 



Larix americana ( = laricina). (1) 



Picea nigra (= mar land). (2) 



Distichium capillaceum ( — Dichelyma capillaceuin) (2) 



Hypnum recurvans (2) 



Lyco podium species (2) 



South of James Bay a number of interglacial deposits have been observed, 

 but it is not known whether they are referable to the Peorian or to the Sanga- 

 mon interval. These are briefly described below: 194 



(1) Beds of lignite on Kenogami River in the bottom of an old channel 

 excavated in the till and again filled by boulder clay. The bed contains sticks 

 of coniferous wood and of the canoe birch. No animal remains have been 

 noted. 



(2) In the bank of Coal Brook, three-fourths of a mile from its junction 

 with the Missinabi River. The bed is three feet thick, and is underlaid by soft 

 sticky blue clay and overlaid by 70 feet of till full of small pebbles passing into 

 gravel at the top. 



(3) Nineteen miles below Coa^ Creek on the Missinabi River, there is a 

 seam of lignite \ x Ar2}/2 feet thick, made up of sticks and rushes; 80 feet of 



191 Johnston, Can. Geol. Surv., Summary Rep., 1912, p. 299, 1914. 



192 Trans. Royal Soc. Can., X, pp. 56-76, 1904. 



193 (1), Moose River locality; (2), Missinabi locality. 



194 Bull. Geol. Soc. Amer., IX, pp. 385-386, 1898. 



