442 J. M. BOUTWELL 
During the present investigation paleontologic evidence was 
obtained from the quartzite itself, from limestone intercalated in its 
lower portion, and from overlying limestone formations, which defi- 
nitely proves the age of the Weber quartzite to be “ upper Carbonifer- 
ous’. During the season of 1903 Dr. T. W. Stanton discovered fossils 
in the quartzite in Weber Canyon. They occurred about 2 miles west 
of Croydon Station, and at 1,800 to 2,000 feet below the top of the 
Weber quartzite formation. 
These fossils prove this quartzite to be of Pennsylvanian (up- 
per Carboniferous) age. No fossils have been found, in the 
quartzite within or adjacent to the Park City district. Definite 
faunas were obtained, however, from limestones intercalated in the 
quartzite on the north side of Snake Creek which underlies the part 
which outcrops in the Park City area. These collections (101-7), 
like those from the formation in Weber Canyon, show faunas of 
Pennsylvanian (upper Carboniferous) age. Further, faunas from 
overlying limestone formations in both the Park City and Weber 
Canyon areas are Pennsylvanian. Accordingly the occurrence of 
Pennsylvanian faunas in the base of this formation and overlying lime- 
stone demonstrates that the age of the Weber quartzite is Pennsyl- 
vanian. ‘The transition in Weber Canyon from the underlying great 
Wasatch limestone formation to the Weber quartzite is by gradually 
increasing siliceous contents through varicolored sandstones, which 
give way to alternating limestones and quartzites, and finally to 
quartzite with intercalated limestone. In Snake Creek the passage 
upward and northward into the Weber quartzite is by a correspond- 
ing succession of limestones intercalated in quartzite. 
The passage from this great quartzite into the overlying formation 
had been subjected to considerable study without definite results. 
Accordingly in the present investigation special attention was given 
to this question. It had been reported by one geologist that a marked 
unconformity existed between this quartzite and the overlying lime- 
stone. During the present survey no unconformity was found. On 
the contrary, excellent exposures showed on careful inspection appar- 
ently complete conformity. The lithologic character of the sedi- 
ments also indicated that a full record is here shown of a gradual 
normal transition. Exposures in Woodside Canyon show a succes- 
