22 F 
EKWAK RIVER 
Timbfr in 
valley larger. 
Sutton Mill 
lakes. 
Marine sliells 
prove Mibinor- 
gence of 
plateau. 
edge of a deep valley running north to Sutton Mill lakes. This con- 
tains a small stream from tlio north-we.st which has cut a deep narrow 
gorge through the houlder clay. This stream enters the valley at 
Sutton Milt lakes about two miles south of the lake and meanders 
back and forth through a marsh at it.s border, 'riie stream is navig- 
able for canoes from the end of the trail or for that part of its course 
which i.s in the deeper valley. Several small rapids over grave?! bars 
are passed before the stream reaches the mar.sh. Tlie Indians have 
erected a Hshing weir at one of the upper ones. This .structure is 
merely a close fence mtule of poles standing acro.s.s tlie stream having 
a basket at one side al.so of pole.s sloping slightly up from the water to 
imprison the fish as they arc going down stream. Small lish pass 
rcatlily either way, but the larger ones are caught. 
The timlier in the valley is very much larger than on the surface of 
the plateau. Mlack spruce and tamarack are the principal trees, and on 
the plateau these average about four or five inches, but in the valley 
near the lake sever.il about twelve inches in diameter were seen. The 
surface is nearly everywhere covered with moss, even on the slopes of 
the valley, and only in occasional places was grass seen. 
Sutton mill Lakes. 
These are represented on the older maps by two fairly large wide 
lakes joined by a short small stream, whereas the lakes are long and 
very narrow, occupying a deep valley running north and south. At 
the south end another valley from a short distance to the west makes 
a bend to the cjist and joins the main one. Thf? water of the lake is 
about 100 feet below the level of the bordering country. The slopes 
of the valley are steep and in many place.s show cut-banks of marine ' 
clay, probaVjly overlying boulder clay. Marine shells were colleeted 
n(>ar the upper surface of the plateau at a lieigbt of 90 feet above the 
lake, so that practically all this area has been submerged w'ith the 
e.xception perhaps of a ridge of trap-covered rocks which cross the lake 
at the narrows. Those rocks protrude through the clay plain in 
rounded oval ridge-s. 
Tlie depth of the valley below the general surface seems to be great- 
est in the southern lake where, by sounding, the water was found be 
210 feet deep, or a total depth for the valley below' the surface of 310 
feet. In the northern part, or the nortliern lake, the width is much 
narrower, but the depth in the centre runs from 100 to 160 feet or 250 
to 260 feet below the general surface. In the narrows the cliffs are 
