GEOLOGY AND PALEONTOLOGY 1 3 
beds, tier upon tier, telling of earlier flows. From one 
of these the river plunges 250 feet to the bottom of its 
deeper gorge. Except in great floods, the volume of the 
river is less than that of Niagara, but its greater height 
and the grandeur of its surroundings make this the most 
impressive waterfall in America. 
Around Seattle, and as we sailed northward through the 
straits, we saw grand sections of the extensive Pleistocene 
deposits so fully described by Mr. Bailey Willis, and then 
began to enter regions less fully explored. 
VICTORIA TO UNALASKA 
BRITISH COLUMBIA 
Our first landing north of Victoria was at Beaver Cove, 
on the east side of Vancouver Island. The local geology 
has been described in brief by Dawson, 1 who notes that 
parts of both shores of the cove are occupied by grey and 
reddish granite, the remainder by compact greenish grey 
feldspathic rocks. On his geological map the granite of 
this place is shown as a small outlier of an extensive mass 
to the east and north, surrounded by dark, metamorphosed, 
basic volcanic rocks. 
We found the country rock to be a dark green diorite 
(3), 2 tough and fine-grained, clearly representing the Van¬ 
couver Series. The diorite is cut in many directions by 
dikes of varying character, from less than a foot to about 
three feet in width. Most of them consist of light to dark 
grey feldspathic porphyries, which on microscopic exam¬ 
ination proved to be quartz-diorite-porphyry (2 and 5), 
with the exception of one which is augite-diorite-por- 
phyry (4). Some of the very narrow dikes are of a grani- 
1 Ann. Rep. Geol. and Nat. Hist. Survey Canada, vol. 11, p. 56B. 1886. 
2 The rock specimens collected by the Expedition are numbered consecutively. 
When a thin section was made, the slide received the same number as the speci¬ 
men. The numbers in parenthesis in the text usually refer to thin sections, but 
may refer to hand specimens or to both sections or specimens. See also page 8 . 
