n 
separating the groups are without the lines. I should think 
this a semico lumnar structure hut for the fact that in places 
the laminae seem to he vertically parallel with the canon and 
when so show "broad smooth faces. Such an area as this breaks 
off abruptly against the bas edges of the other out- 
cropping la: inae. 
Down the middle portion of this scarred wall a cascade 
falls, from the very top. For 500 or 600 feet it is very steep. 
The thread of water sliding down the smooth, irregular groove 
made for itself , falling free at tines. The lower half is on 
a steep slide between dense trees. The lower slopes here have 
the tree 3 . t the lower end of this great wall the river 
bends to the east (see map) and afterwards turns again into 
its almost direct, Straight course. At and above the bend 
and extending below is a series of hot springs and remarkably 
colored slides. The reds prevailing. Steam vents appear 
all along for a couple of miles. 
On top of the Canon wall about one mile below and 
below the mouth of the creek that comes in from the left, a 
heavy series of stratified beds come in. They look like 
conglomerates and are slightly tipped up to the west. 
Pound it too late to go farther and Washburn Creek 
seemed pretty deep 'in canon. Turned to the left and rode 6 or 
8 miles through the forest along, the base of a series of long 
table-like hills that lie along the south base of the mountains. 
Found outcrops of trachyte and obsidian. They must be in 
horizontal or nearly horizontal beds. 
