464 THE JOURNAL OF GEOLOGY. 
Cretaceous sandstone rests directly upon and covers the granite, 
which, however, makes its appearance again in the bottom of a 
deep ravine a few hundred yards to the east. The basic rocks 
come to the surface almost in contact with the granite and con- 
tinue to the summit of the low ridge eastward, where they are 
covered by the Cretaceous sandstones. These sandstones extend 
from this point for a distance of a mile or more; beneath them 
the igneous rocks again appear in the canyon of Carter Creek. 
From this place they continue eastward indefinitely. 
Figures 4 and 5 represent, on a larger scale, some sections at 
points in the vicinity of Wagner’s Soda Springs. 
Figure 4 is a north-south section across Sampson Creek a 
short distance from its mouth. The sides of the canyon are of 
Cretaceous sandstone, which has been eroded by the stream down 
to the older basic rocks which here underlie it. 
Figure 5 is a northeast-southwest section across Carter Creek 
one mile north of Smith’s Soda Springs. In the bed and on both 
banks of the creek the rocks are the basic eruptives which, at 
twenty feet from the stream, on the east bank, show clearly their 
contact with the sandstones which project over them. These 
sandstones form the whole of the ridge toward the east, until, in 
the bottom of the next ravine, half a mile to the northeast, the 
older lavas again make their appearance. | 
Thickness of the beds.—It is not easy to say what the original 
thickness of these beds has been, but the estimated thickness of 
those remaining is between ten thousand and fifteen thousand 
feet. 
Coal beds.—At various places along the eastern side of the val- 
ley small beds of coal are occasionally found. They are the mere 
remnants of beds once more extensive; they are thin and of no 
economic importance. 
Faults. —Although in some of the accompanying sections 
there is a suggestion of faulting along the line of Bear Creek, 
there is no evidence that this is the case. The strata have a uni- 
form dip on both sides of the valley, and those found along the 
western side are nowhere represented on the eastern. No fossils 
