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forraed, where Carp River enters the lake (fig# 45). The 
submerged part of the delta extends well out into the lake, 
being several hundred meters broad at its widest portion 
(fig. 46). Hero the water is shallow, varying from 3-10 
dm. in depth. The west end of the lake is also shallow, 
and ohoked with aquatic growth and debris, especially near 
the outlet. In general the beaches are very narrow. Most 
of those on the north side are of the shingle type. In 
places they are entirely lacking, the shore line being 
directly bordered by a fringe of shrubs similar to those 
along the bank of the river. Sandy beaches occur on the 
south side and near the west end on the north side. They 
are broader than the gravel beaches and show more clearly 
the zonal development of vegetation. The edaphic con¬ 
ditions are naturally more stable around the margin of 
the lake than along the river. Especially is this true 
on the south side where deposition is occurring more rapidly 
than on the north. 
The free-floating aquatic vegetation of the 
lake, being very similar to that of the river, need not be 
mentioned. The best evidences of plant succession are seen 
on the flat sandy beaches and on muddy flats near the 
delta. At the delta there is a zone of rushes extending 
from 50 - 100 m. out into the lake. Its outer part consists 
