16 ASSINNIBOINE AND SASKATCHEWAN EXPEDITION. 



Eiver, having been kept back by contrary winds. His 

 prospects of traversing the lake rapidly were now more 

 favourable, as the south wind which prevailed would 

 soon drive a freighter's boat to Norway House. 



Sept. 23rd. — The rocks at Grindstone Point, about six 

 miles north of Deer Island, are similar to those already 

 described in the previous section. Being further north, 

 the exposure is higher, and the sandstone bands more 



Grindstone Point. 



fully shown. Beneath No. 1 of Deer Island, a hard, 

 yellow, compact sandstone appears, and is exposed for a 

 space of four feet above the level of the water. Strata 

 No. 1 and No. 2 of Deer Island appear in a slightly dif- 

 ferent form here : the sandstone bands are thicker ; the 

 green shaly portion more distinct as a separate band, and 

 two feet thick ; while above the hard yellow sandstone, 

 the base of No. 1 appears in the form of a purple band 



