HUNTINGTON AND GOLDTHWAIT: THE HURRICANE FAULT. 259 
low mature hills of hard Aubrey limestone, —relics of ancient topography 
along the earlier Hurricane fault line, which acted as a barrier to the basalt 
when it flowed eastward across the old fault line. In the foreground is a 
gravel plain covering the lava on the downthrown side of the recent fault. 
The ruggedness of this fault is shown by the series of “splinters” of lava 
along the cliff front, just north of the canyon. 
PLATE 4. 
A. Cliffs near Zion. Photograph by W. M. Davis. Lofty peaks of red Kanab 
sandstone with white Colob sandstone above. 
B. Rock sculpture in Virgin canyon. This view south over Rockville shows some- 
thing of the characteristic form of each member of the series, from Moen- 
copie to Kanab. In the foreground is the flat-floored valley of the Virgin, 
with the little Mormon town and its irrigated fields. The bad-land topog- 
raphy of the soft Moencopie shales shows in systematic spurs that run down 
from the Shinarump platform in the middle of the picture. This platform 
is banked by landslides of Painted Desert. In the distance is the high cliff 
front of red Kanab sandstone, showing the characteristic vertical rifts. The 
bench-maker at the top of the Painted Desert shows distinctly on the left. 
PLATE 5. 
A. Pleistocene gravels in the Grand wash. The gravel deposit is now being ex- 
cavated by erosion. The larger boulders are basalt; the smaller are sand- 
stone and limestone. 
B. The two faults at Kanarra. The view looks northeast. The new fault forms 
the prominent escarpment; the old fault passes from x to y, where it cuts 
the new one. The strata to the left of x are inverted and dip to the north- 
west; those to the right are normal and dip gently to the east. 
PLATE 6. 
Cross-sections to accompany map of the Toquerville district. Drawn to scale; no 
vertical exaggeration. 
PLATE 7. 
Geological map of the Toquerville district. Topography and geology by E. Hunt- 
ington and J. W. Goldthwait. The contour interval is 200 feet. 
