Postelsia 315 
well stratified rocks we observe their strike and 
dip near the head of the gorge. The former 
measuces Wi 45° 5. Magnetic, and the latter 257 
northwest. Some pebbles are gathered to show 
the varied colors and the clear crystalline habit 
of the rock and one starts on the return to the 
Station. 
Working one’s way down through the almost 
impenetrable salal from the rude trail to the 
shore, little change is found in the character of 
the rock. ‘Toward the west are several deeply 
cut ravines where streams have worn trenches 
to the strait. These are crossed with difficulty, 
because the resistant nature of the siliceous shale 
to weathering and wave wear produces vertical 
walls. Now and then a shaly condition of the 
rocks alternates with quite massive beds. We 
soon learn to distinguish these relations in the 
surface contour of the rock; where projecting 
masses stand up against the waves there is found 
a hard and crystalline layer quite like the walls 
of Providence Cove. At Kirkpatrick’s we again 
measure strike and dip. ~(ihe former isW. 10° 
5. and the latter 25° northwest. Many minor 
