21

bulk of the material. Several specimens of a coral resembling, so far as
can be judged from the poorly preserved material, a Zaphrentis, are
present. Two brachiopods with obscure features which may represent
Spirifer keokuk and fragments suggesting an Orthoceras complete the fauna
as represented by this collection. Notwithstanding the limited number
and extremely unsatisfactory state of preservation shown by these fossils,
I have no doubt that they represent a Carboniferous fauna probably of
Mississippian age. The material, however, is not good enough to demon-
strate this correlation of the fauna.”

This paleontological record, together with the lithology of the
formation and its position a few hundred feet above the base of the series,
seems to establish without much doubt the correlation of the Greenberry
limestone and the lower part of the Slide Mountain series in general, with
the lower part of Dawson’s Cache Creek series of the Kamloops map-
area. In regard to the lower limestones, Dawson! says: ‘“The limestones
found in the lower part of the formation (Cache Creek) to the east of the
main syncline are seldom more than a few hundred feet in thickness and
often much less. They frequently prove on microscopic examination
to be composed chiefly of crinoidal debris, but often contain Fusuline
and other foraminifera, as well as fragments of polyzoa and molluscs.”

Waverly Formation

Distribution. The Waverly formation occupies a stratigraphical
position above the Guyet conglomerate, in places almost immediately
above it, and in other places separated from it by the Greenberry forma-
tion. On account of insufficient exposures and their lack of continuity,
it was impossible during the progress of the field work to locate the horizon
of this formation more closely.

The most characteristic exposures occur on the tops of Waverly
mountain and mount Greenberry, but the prevalence of glacial drift in
the vicinity prohibited the correlation of the exposures even in localities
almost contiguous.

Lithology. The rocks of the formation consist partly of andesitic and
basaltic lava, with prominent pillow structure, and partly of schistose
amygdaloidal andesitic and basaltic flow breccias. The relationship
between these two types could not be ascertained in the field on account
of their occurrences in isolated exposures. On the southeastern slope of
mount Murray, close to the 6,000-foot contour, prominent pillow structure
is observed in andesite which contains scattered fragments of red quartzite
and argillite. On mount Waverly andesitic flow breccias, largely schistose,
contain abundant fragments of red argillite of the Antler formation. In
a creek gorge 8,000 feet due east of mount Greenberry there occurs an
area of massive, non-schistose pillow basalt, which is included with the
Waverly formation. The pillows vary in diameter up to 5 feet and the
inter-pillow spaces are filled with coarse-grained calcite. Vesicles and
calcite amygdules are arranged concentrically in the outer parts of the
pillows.

1Geol. Surv., Canada, Ann. Rept., vol. VII, pt. B, p. 42 (1895).