A Study of Cide-pools on the Wee 
Coast of Mancoubver Fsland 
ISABEL HENKEL 
During the summer of 1903, the writer 
spent the month of July at the Minnesota 
Seaside Station, near Port Renfrew, on the 
west coast of Vancouver Island, and at this time 
the notes for this paper were taken. 
The shore of this coast is remarkable for 
its extreme rockiness, and for the varieties of 
erosion produced by the waves and the tides. 
Fairly well back from the shore, the rocks stand 
in vertical cliffs, with flat rock in front sloping 
eently to the water's edge. Plate XX. fig.1. isa 
good illustration of the shore line. 
The principal rock formations are sand- 
stone, conglomerate, and shale. From a com- 
parison of the rocks at points where the series 
is) complete, ij ise Seem that “the “shale lies 
at the bottom,.the conglomerate overlies the 
shale, and the sandstone overlies the conglom- 
erate. It happens, however, in many places, 
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