Sf

Ostrea ? sp.

Lima sp. cf. L. gigantea (Sowerby).
Trigonia sp. cf. T. Dawsont Whiteaves.
Pleuromya laevigtata Whiteaves.
Pleuromya carlottensis Whiteaves.
Thracia semiplanata Whiteaves.

Cephalopods.

Stephanoceras sp. a.
Stephanoceras sp. b.

BA FHOLITHIC ROCKS.

KANO QUARTZ DIORITE.

Distribution. The name Kano quartz diorite is applied to a
series of rocks of batholithic origin which are found in the
vicinity of Kano inlet, on the southwest coast of Graham island.
Between Lawn hill and Skidegate inlet “granite” is reported on
good authority as occurring on one of the branches of the Tlell
river. Elsewhere on southern Graham island no_ batholithic
rocks have been seen; but they are found in many places on the
southern islands of the Queen Charlotte group.

Lithology. The rock that apparently makes up the greater
bulk of the Kano quartz diorite is light grey, whitish weathering,
and medium even-grained. It consists largely of a whitish-grey
plagioclase, abundant glassy quartz, and between 5 and 10 per
cent of an altered hornblende. Some varieties are coarser, and
others contain more hornblende and less quartz, grading into
diorites. The formation has not been carefully studied, and the
relations and proportions of the various types are not certainly
known; but they represent without doubt different facies of a
stock or small batholith.

Structure. The internal structural relations of the batho
lithic masses have not been determined, and the areal distri-
bution and relative volume of the various types are not known.

Although no detailed work has been done in this area, it is
fairly certain from the general relations that the Kano quartz
diorite cuts the rocks of the Vancouver group in an intrusive
manner.