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and a relative scarcity of potash feldspar. Such material would appear to be
possibly indicative of rocks of intermediate composition; if igneous, about
in the andesite-diorite-grandodiorite range.

AGE

Metamorphism has obliterated most of any fossiliferous material the
Ingenika group rocks may have contained, and most of the few structures
that are recognizable as the remains of organisms are too recrystallized to
be identified. One small lens of limestone surrounded by chloritic phyllites
north of Osilinka River, about 4,000 feet above the lowest exposed beds in
this section (See page 74), and probably much more above the base of
the Ingenika group, contains recognizable archaeocyatha. These fossils
(Collection FIR (1946) and 15229 (1947) were submitted to Dr. V. J.
Okulitch of the University of British Columbia, who reported (Okulitch
and Roots, 1947; and personal communication, 1948) on them as follows:

“Faunal list:

Ajacicyathus purcellensis Okulitch

A. clarus Vologdin

A. osilinka nsp. : |
Coscinocyathus sp.

Dendrocyathus inexpectans n.sp.

Protopharetra rootst usp.

Archaeocyathus cf. A. atlanticus Billings

Cambrocyathus sp.

Age: Lower Cambrian, equivalent to the Donald formation of the Dogtooth
Mountains, British Columbia.”

No other collections containing definitely diagnostic fossils have been
obtained to date. Dr. Okulitch reported! on some of the other collections
as follows:

“Coll. 15237 (from blue-grey crystalline limestone near the base of the large lime-
stone bluff 4 mile west of the Beveley mineral claims): white patches, possibly
archaeocyatha, uncertain.

“Coll. 15238 (from mid-section of limestone bluff west of Beveley mineral claims,
about 100 feet stratigraphically above Coll. 15237): archaeocyatha, not identifiable
as to genus.

“Coll. 15240 (from top of limestone bluff west of Beveley mineral claims, about
600(?) feet stratigraphically above horizon of Coll. 15238): most likely a coral
and not a archaeocyatha; possibly a Caninia or a Cyathophyllum, but not certain;
has a Silurian-Devonian aspect.

“Coll. F6R (1946) (from the summit of a limestone hill 4 miles southeast of Chase
Mountain): contains algal remains, similar in appearance to those common with
fossils from the Donald formation.

Age: Lower Paleozoic, probably Lower Cambrian.” (Similar-appearing algal
structures are abundant 3 miles northeast of Mount Lay.)

“Coll. F7R (1946) and Coll. 15222 (1947) (from an open-pit on No. 3 vein, Ferguson
property, Ingenika Mines, Limited): contains poorly preserved tubes resembling
Salterella or Hyolithes.

Age: possibly Lower Cambrian.

“Coll. 15242 (from north end of the Espee Range): rounded structures containing
what may have been originally sponge spicules, but rock is too strongly recrystal-
lized to allow identification. é F

“Coll. 15218 (from north end of the Espee Range): not diagnostic, poorly preserved
alge.”

1 Personal communications, 1947, 1948, 1949.

78609—74