360 E, M. KINDLE 
Lakes Mamawa and Clair, lying west of Athabasca Lake, appear 
to represent parts of a former greater Lake Athabasca which have 
been segregated into separate lakes by lake filling. Lake Clair 
has a shore line approximating 200 miles in length. Its depth is 
reported seldom to exceed 8 feet. Little Lake, through which the 
outflow of Lake Athabasca passes, is extremely shallow except for a 
channel through which most of the outflow passes to Slave River. 
East of this channel a large area on the north side of the lake is 
completely silted up. On the west side large areas of aquatic plants 
and stranded logs indicate the approach of the final stage and extinc- 
tion of the lake. 
Observations made on the relative clarity of the Slave River 
water above and below the mouths of the Peace show but a slight 
difference in the clarity of the water. This would indicate that the 
river water passes through the narrow western part of Lake Atha- 
basca too quickly to lose nearly all of its sediment. | 
