2

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of black, lustrous, carbonaceous argillite. In many places the part-
ings have a slaty cleavage and have been partly metamorphosed to
graphite or to micas In the vicinity of the Pinchi Lake mercury mine
similar rocks have been carbonatized and are in large part quartz-
carbonate schists. The ribbon cherts are characteristically veined
by white, crystalline quartz. The veinlets are normally less than
1/16 inch wide and ¢ inch apart, and stand out in slight relief as

a reticulated pattorn on weathered surfaces.

‘The other argillaceous members of the Permian section
are black to grey, carbonaceous rocks, Beds are rarely over 6 inches
thick. The rocks are commonly schistose and in places show a slaty
cleavage.

Interbedded with the argillites and quartzites are
beds of dark grey, schistose greywacke and conglomerate from a few
inches to 10 feet thick. Pebbles in vaste conglomerate are predominantly
of chert and quarts and rarely exceed $ inch in diameter.

Near the Pinchi Lake mercury mine and the west end
of Pinchi Lake bands of grey-green, quartz-glaucophane schist are
interbedded with quartz-mica schists.

Dawson! assigned the limestones and related rocks out-

a anne anneal

lReport on the Area of the Kamloops Map-sheet, British Columbia;
Geol. Surv., Canada, Ann. Rept., new series, vol. VII, 1894,
pt. B, pp. 38-39 (1896).

Rr nn ery rere eeeneenmeenemnemenmnemnnmenenel

cropping along the shores of Stuart Lake to the Cache Creek series

of Carboniferous age. He based his conclusions on the occurrence

of Fusilinae in the limestones of Pope Mountain. Professor C.A. Dun-
bar®, of Yale University, after a preliminary examination of the

Soe aon communication to W. A. Bell, 1941.

errr een EE RE EL TL

“Fusilinae collected by Dawson reports that they are of Lower Permian
Ages j

_ Fusilinae collected from five localities in the lime-
stones were submitted to Professor Dunbar for examination. He made
a preliminary report? on them, , from which the following information
is taken:

Personal Communication, 1942.

: ie

Collection 6A, approximately 14 miles west and ] mile
north of east end of Trembleur Lake, includes the Oriental genus
Cancellina and two species of Parafusulina. Age: . Middle Permiane

Collection 5A, approximately 1 mile west and 1 mile
north of east:end-of.Trembleur Lake, includes Verbeekina and
Misellina ovmnrelay Poliolina). Age: Middle Permian, but younger

BROWS PES) VA ia NY ay Ee et dal

: doililetsion 4A, approximately a naive west and 1 mile
north of east end of: Trembleur Lake, includes typical Neoschwagerina
as well as Cancellina and Parafusulina. Age: Middle Permian, but
younger than OA.