GENERAL GEOLOGY 
27 
scribed by Lawson/ who assigns them (doubtfully, owing 
to lack of fossils) to the Jurassic or to the very lowest 
Cretaceous. 
Correlation over such wide distances, based only on 
lithologic similarity, has of course little value, but taken 
in conjunction with the other evidence for the existence 
of Mesozoic rocks in the Cook Inlet region, the facts may 
here be given a certain amount of significance. 
From the steamer it appeared that the same chert series 
was present at Seldovia, lower down on the same side of 
the bay; but the rocks were not visited, and the only 
specimens brought aboard at that point were of shale and 
grey limestone impregnated with pyrite and pyrrhotite. 
At Kadiak, on Kadiak Island, I received from Mr. W. 
J. Fisher, an old resident, several ammonites and speci¬ 
mens of Inoceramus porrectus Eichwald “from the moun¬ 
tains below Homer on Cook Inlet,” and Belemites pax- 
illosusf from Kamishak Bay on the western side of Cook 
Inlet. “The mountains below Homer” would indicate 
some point in the mountains back of Seldovia, which 
would be a new locality for these fossils, although other 
Neocomian fossils have been found near Port Graham. 2 
KADIAK ISLAND 
The rocks around the village of Kadiak and on the adja¬ 
cent islands are of the Vancouver Series. At Sturgeon 
Bay, at the west end of Kadiak Island, we found massive 
cliffs of igneous rocks. A dark uralitic diorite of grani¬ 
toid structure (133)? probably an altered gabbro, is cut by 
a lighter-colored grey granite (135), full of blue quartz, 
1 Geology of the San Francisco Peninsula. 15th Ann. Rep. U. S. Geol. 
Survey, p. 420. 1895. 
2 Dali, Coal and Lignite of Alaska, 17th Ann. Rept. U. S. Geol. Survey, 
pt. 1, p. 866. 1896. 
It is possible that these fossils came from the locality at Anchor Cape, Cook 
Inlet, mentioned by Dr. Dali on the same page. 
