50 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
EXPLANATION OF PLATES. 
1A. An outlier of the White cliffs; Jurassic sandstone next west of Kanab creek. 
1B. Detail of the base of Plate 1, showing cross-bedding. 
2 A. Detail of cross-bedding in Jurassic sandstones, west branch of Kanab creek. 
2B. Vermilion cliffs: Triassic sandstones west of Pipe spring. 
3 A. Sevier Fault at Pipe spring: looking north. In middle distance, the Shina- 
rump bench, coming from the east, is cut off by the fault. The Triassic cliffs 
follow in the background. On the left, the Triassic cliffs stand in the middle 
distance beyond Moccas: valley. 
3B. Shinarump mesa with Permian slopes, between Antelope wash and Canaan 
gap. 
4A, B. The south wall of the Colorado canyon from the northern esplanade east 
of the Toroweap fault. The two views overlap slightly. Two ash cones lie 
on the esplanade in Plate 4 B. 
5 A. South Toroweap valley, from the southwestern corner of the northern espla- 
nade. The uplifted esplanade sandstone at the left margin is the same 
stratum as that of the general level of the valley floor. The cliffs in the 
central foreground are capped with lava: a small ash cone lies on their edge 
to the right. 
5B. Looking down the Colorado canyon from Vulcan’s throne. Lava sheets 
form the slopes on the right. The Shivwits plateau is seen in the distance. 
6 A. The “ West Temple”: Triassic cliffs over the Shinarump bench, valley of 
the Virgin at Rockville. Landslide masses at base of the cliffs. 
6B. The Cliffs of Zion, Mukuntrweap canyon; Jurassic and Triassic sandstones. 
7A. Looking southeast across tue valley of the Virgin at Rockville from the 
Shinarump bench. Many of the hills on the Shinarump bench on the further 
side of the valley are landslides that have run forward from the Triassic cliffs 
in the background. 
7B. Slabs of sandstone from the Green river Tertiaries, Wyoming. 
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