[keele] MESOZOIC clays AND SANDS 35 



(2) Dark grey, highly plastic clay 3'-0" 



White clay 3'-0" 



White sand with clay bond lO'-O" 



Water bearing sand 



(3) White clay 3'-0" 



Mottled pink and yellow clay 2'-0" 



Reddish pink clay 2'-0" 



Silty grey clay 3'-6" 



White sand I'-O" 



Water bearing sand 



An effort was made to find the clay at higher levels by boring 

 through the glacial drift in the high banks. Five holes were started 

 on terraces at different levels on the boulder clay, but none of them 

 succeeded in getting down very far owing to the stones scattered 

 through the clay. There are no surface indications of the fire-clays 

 in the slopes of the higher part of the bank, but the constant slumping 

 of the glacial clay and the thick forest and plant growth are sufficient 

 to conceal any outcrops. The bottom of a small creek which enters 

 the river not far from the fire-clay outcrop was followed up, but, 

 although the little stream had cut deeply into the glacial clays, it 

 did not reveal any fire-clays beneath them. 



About six miles below the foot of Long Portage, at the big bend 

 on the Mattagami, another outcrop of fire-clays occurs in the lower 

 part of the bank of the ri\'er. The following beds were seen between 

 the overburden of glacial clay and the river level. 



Stiff, plastic bluish clay 4'-0" 



Well indurated, yellowish sandstone, with abundant 



fossil plant remains 2'-0" 



Light blue-grey clay 2'-0" 



Laminated bluish-grey, silty clay 2'-0" 



Massive bed of dark grey micaceous plastic clay 3'-0" 



A little farther down the stream a bed of hard, black lignite with 

 a woody structure, accompanied by white and black plastic clays, 

 outcrops at intervals near the river level for a distance of 100 yards. 



Only about 2 or 3 feet of these beds are exposed below the glacial 

 drift, and from the upturned attitude of the lignite seam they seem 

 to have slumped from a higher level. It is possible that the lignite 

 and the white and black clays properly overlie the section given above. 



—34 



