GENERAL GEOLOGY 
51 
with this material. At the conspicuous nunatak they are 
cut by a rhyolite dike, already described on page 25. 
The same slaty rocks seem to compose the shore to the 
westward, including College and Harriman fiords. We 
landed at the Bryn Mawr Glacier, in College Fiord, and 
found the slates cut by two small aplite dikes. 
This series of rocks has been called the Orca Series by 
Mr. F. C. Schrader. 1 
KADIAK ISLAND 
The eastern half of Kadiak Island and the adjacent 
archipelago are made up of the Vancouver slates without 
intrusives. Only one block of a scoriaceous basalt was 
found on the shore at Kadiak village, and that may have 
been brought there as ballast. Figure 12 shows the village 
and a group of smaller islands off the coast. The shore 
was examined for several miles on either side of the town, 
and the mountain from the slope of which the picture was 
taken was ascended. Everywhere the slates were found, 
and the fossils were especially abundant along the shore 
concealed by the hill in the foreground, and in the bluff 
coast of Pogibshi Island opposite the town. The tip of this 
island, where several unique specimens were obtained, 
is represented in figure 13. A photograph (plate vi) 
showing the cleavage was taken by Mr. Gilbert on the 
slender cape running to the right from the same island. 
At the cleared place in the middle of the most distant is¬ 
land but one (Woody Island) is the station of the North 
American Commerical Company. Just to the left of this 
is a locality at which Dr. Dali, in 1895, found bivalve 
shells in association with the more common fossils of the 
slates. 
The section of slate in plate vi shows both bedding and 
cleavage. The bedding dips there 6o° to the SE, the 
1 20th Ann. Rep. U. S. Geol. Survey, pt. vn, p. 404. 1900. 
