430 T. B. Comstock— Geology of Western Wyoming. 
The metamorphic nucleus of the Owl Creek range is not well 
exposed, being covered, except in a few isolated localities, by 
the early sedimentary rocks. 
Continuing our march, we crossed the three forks of Owl 
and the Stinking Water River. I have said nothing of the 
magnificent terraces, the enormous deposits of the drift, the 
cafions and gorges cut by the streams, nor of the no less inter- 
esting proofs of the power of the wind; and yet these are but 
the half of the agencies whose actions are here so plainly in- 
dicated. 
From Grey Bull River to the Stinking Water Valley our 
course lay through a less rugged country until we reached an 
eminence which gave us a view of some of the minor trib- 
utaries of the South Fork, when we were obliged to descend 
by a very steep trail to the valley below. From this point our 
march was comparatively easy to the north branch of the 
South Fork, which we ascended to its source in the mountains 
east of Yellowstone Lake. Passing through a narrow pass i 
this range, we descended on the other side to the lake, then 
marched down the Yellowstone River to the bridge, and 
crossed, a portion of the party visiting the hot springs of Gard- 
iner’s River. From the bridge we passed up the river to the 
falls, from which point we struck across westward, over the 
divide to the East Fork of Madison River, thence through the 
Lower and Upper Geyser Basins of Firehole River. Ascending 
the Firehole River, we then crossed the divide to Yellowstone 
Lake at the Sonthwest extremity, following pretty closely 1s 
shore until we reached the Upper Yellowstone River, which 
we ascended to the ‘‘Two Ocean Water.” This is a mou 
tain stream which flows down into a little valley, wh Pe 
er, 
curiously splits into two rivulets, which shed their ner ee 
. olum- 
for a short 
M 
distance one of the tributaries of Snake River, our Indian guide 
To-goh-te led us through an easy pass to the head-waters of baa 
obes core which we marched, returning to Camp Brown 
sban 
The head-waters of the Stinking Water,* rising in the very 
80 
* It is to be regretted that many of the geographical names in the West ar® t 
often repeated, rendering it difficult to distinguish between localities, ie 
tedious explanation. For instance, the names Muddy, Sandy, Clear, YF) 
