GENERAL GEOLOGY 
45 
Yakutat Bay, Prince William Sound, Kadiak, and Port 
Clarence in the far north near Bering Strait. The ob¬ 
servations given above (page 41) show its possible presence 
on St. Lawrence Island. It is even more probable, from 
the observations of Dr. Dawson, 1 that the same series is 
present on Atka Island and Attu Island, the westernmost 
of the Aleutians, where the rocks comprise (1) much al¬ 
tered and indurated volcanic materials with purplish, green¬ 
ish and grey colors, partly eruptive, partly clastic, (2) fine¬ 
grained feldspathic elastics which pass into a black com¬ 
pact material, apparently a true argillite. They are 
strongly folded and eroded. 
The series was described first by E. Hoffman in 1829 
from Sitka, in his Geognostische Beobachtungen, as a fine¬ 
grained siliceous greywacke with interbedded clay slate. 2 
Dr. Dawson, in his report cited below, says that the 
name Vancouver Series was first applied by Dr. Selwyn 
in 1871 to the similar argillites, quartzites and limestones, 
with interbedded volcanic materials, of the southern part 
of Vancouver Island. 3 
In 1886 Dr. Dawson applied the name Vancouver Se¬ 
ries to the entirely similar beds in the northern parts of 
Vancouver Island and in the Queen Charlotte Islands to 
the north, 4 in which fossils characteristic of the Alpine 
Trias have been found; namely, Monotis sub circular is 
Gabb, Halobia ( Daonella ) lomelli Wissman, Aulaco - 
ceras charlottense Whiteaves, Arcestes gabbi Meek, 
1 Geological notes on some of the Coasts and Islands of Bering Sea and vicin¬ 
ity. Bull. Geol. Soc. Am., vol. v, p. 122. 1894. 
2 Becker, Gold Fields of Alaska, 18th Ann. Rep. U. S. Geol. Survey, Pt. hi, 
p. 43. 1898. 
3 This would seem to be a lapse of memory, as in the report of Dr. Selwyn 
the term Cascade Mountains and Vancouver Island Series is applied to a wholly 
crystalline complex of gneisses, diorite-porphyries and limestones, placed below 
rocks containing Paleozoic fossils. Geol. Survey Canada, Rep. Prog. ’7i-’72, p. 
64. 1872. 
3 Rep. on northern part of Vancouver Island, Geol. Survey of Canada, Ann. 
Rep., N. S., vol. 11, pp. 9B- 10B. 1886. 
