135 
extend upward but a few feet and no doubt represent the lower 
portion of this dike. 
DikE V. Eighteen feet above the level of the stream and 
eleven inches east of No. 4, this dike occurs. It is 2% inches in 
thickness and has entirely changed to a light-greenish colored 
earth. It extends upward toward the top of the cliff clearly dis- 
cernible as far as the eye could reach. A half dozen minute seams 
of igneous matter, not more than 1-20 of an inch in thickness, 
extend along parallel to this dike and on either side of the same. 
Dikk VI. Fight feet above the level of the stream and 
twenty-six inches east of dike No. 5, a thin seam of igneous mat- 
ter occurs, which gradually grows thicker as it extends upward. 
and then thins out again, disappearing at 151% feet above the 
level of the stream. It is the smallest and narrowest of the dikes, 
its maximum thickness being only 5¢ of an inch. 
Dike VII. About eighteen feet above the level of the 
stream and twelve inches east of dike No. 6, the last dike in this 
gorge was noticed. It is a badly disintegrated mass of greenish- 
yellow color, about an inch in thickness and is easily distinguished 
from the adjoining black shale as it extends toward the top of the 
cliff. 
That some of these dikes also occur on the north side of the 
gorge is unquestionable, but the large amount of talus here pre- 
vented any study of the same. 
In the first ravine to the southeast of Townley’s creek, we 
have other traces of the dikes. They occur about midway be- 
tween the first and second falls, or 300 yards east of the falls over 
the Tully limestone. 
Dike I. is best seen on the north bank of the stream where 
it is 1% inches wide. It maintains this thickness across the entire 
width of the stream. 
It strikes north and south, magnetic 
It has changed to a lightcolored earthy substance slightly 
different in appearance from the decomposition product of the 
other dikes. 
Dike II. Six feet and three inches east of No. 1, a second 
dike occurs. It is 114 inches wide in the center of the stream, 
