200 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
The course which our party took, and the dates at which we touched 
certain points in the plateau country have already been outlined in a 
paper by Professor Davis (d, pp. 2, 3). The wagon route led southward 
from the terminus of the railroad at Marysvale up the Sevier valley, to 
the divide between the Great basin and the Colorado river. Thence we 
moved on, following Kanab creek from its headwaters to the town of 
Kanab, and passing in succession the great series of broad terraces and 
stupendous cliffs which descend step by step to the Colorado river, one 
hundred miles away. In this series of steps we saw consecutively the 
pink Tertiary cliffs, the brown Cretaceous ridges and hills, the snow- 
white “‘ Jurassic” escarpment, and lastly the blazing “‘ Vermilion ” cliffs 
and the outlying “Chocolate” cliffs of Kanab. From Kanab we 
journeyed on horseback across the desert platform of Carboniferous 
limestone to the Grand canyon, at Mount Trumbull, —a place almost 
never visited by sight-seers and rarely by scientific travellers. Thence, 
after two days on the esplanade halfway down the canyon, we rode north- 
ward nearly parallel to the Hurricane fault and a few miles east of the 
“ Ledge,” to the Virgin river at Rockville. Just above the village, near 
the Temples of the Virgin, at Zion, we saw the slit-like cleft which the 
river has cut down two thousand feet through the massive red and white 
sandstone. From here it was but a short day’s trip down the canyon to 
Toquerville, where we made our headquarters during the three weeks in 
which we were studying and mapping the surrounding region. At the 
end of a week Professor Davis went on to Nevada, to study there some 
of the ranges of the Great basin. After the third week one of the 
writers returned to Salt Lake city, while the other spent two weeks visit- 
ing the Colob plateau, the Grand Wash, and the lower end of the 
Colorado canyon. 
The Toquerville district is one where the whole aspect of the country 
is as varied as its geologic structure. The town is situated at the base 
of the Hurricane ledge, a high steep escarpment which marks the 
course of the Hurricane fault and delimits the great plateau region of 
the east from the broken Basin Range region on the west. The Hurri- 
cane ledge proper, running northward from the Colorado river, decreases 
in height a few miles southeast of Toquerville, and finally, very near the 
town, dies out ; a short distance northwest, however, a new escarpment, 
locally called Bellevue ridge, continues north nearly in line with the 
Hurricane. Between the point where the Hurricane dies out and the 
Bellevue ridge begins is Toquer hill, a connecting link with anticlinal 
structure. From the top of this bill, just above the town, one looks 
