368 TJie American Geologist December, i898 
blocks of rock which have fallen from the bordering clififs, 
but is entirely without glacial scorings, moraines or other 
evidence of ice work. 
Below or south of the southern end of Antwine's coulee, 
as also stated by Dawson, there is another short coulee, 
similar in character to those just considered, the course of 
which in general, is parallel with the Columbia. The author 
just referred to, states that this coulee is about a mile in length 
and occupied at present by glacial debris. My study of the 
coulee in question, however, failed to show that it contained 
any glacial debris or that it was either produced or modified 
by glacial action. I did find alluvial cones, talus slopes, fallen 
blocks, etc., of the same character as those obstructing Ant- 
wine's coulee. 
Kiiapp's Coulee : On the south side of lake Chelan, about 
three miles from its eastern end, there is another coulee, 
similar to those referred to above, known as Knapp's coulee. 
This is a deep narrow trench in a mountain mass that rises 
from 1800 to 2500 feet above the lake's surface, and has a 
length of four or five miles. Its general course is nearly at 
right angles to the trend of the eastern portion of Chelan 
valley, and at its southern end it opens out into the valley of 
the Columbia. In describing this channel and discussing its 
origin, Mr. Dawson states that: "It is an ice-hewn valley, 
a discharge pipe of the Chelan glacier. Originally consist- 
ing of two opposite valleys heading at near the same point on 
the divide, it was selected by the ice as presenting the easiest 
avenue of escape across the rampart; i. e., the lowest point, 
and was subsequently deeply excavated by the long continued 
and gradually concentrated ice-flow. To-day its superficial 
features of kettle-holes and morainic banks have not been 
obliterated or even noticeably modified by subsequent 
changes." 
I traversed the entire length of Knapp's coulee last 
September, and, as in the similar instances cited above, failed 
to find any evidence of the work of ice ; but I did find alluvial 
cones, talus slopes, and fallen blocks in abundance, together 
with undrained basins between the larger obstructions. 
The relation of Knapp's coulee to the valley occupied by 
lake Chelan is in itself suf^cient to show that the great Chelan 
