narrow belt of black argillaceous quartzite crosses Lot 1685c, at the head of Olally
Creek, in a north-westerly direction, but could not be traced farther towards Burns
Creek. Elsewhere in the area black quartzite and argillite-is not common. It is to be
seen in a band a few tens of feet wide on the west branch of Oregon Gulch where it is
presumably cut off by a fault, in the south-west corner of Lot 1670 on Davis Creek, and
along the east side of Last Chance Creek south of the head of the hydraulic pit where
its westward extension is cut off by a fault.

Hard, massive, and partly silicified medium to light grey quartzite outcrops in a
band about 600 feet wide along the trestle on the east side of Devils Lake Creek south
of Hong’s siphon. It is thought to extend eastward to terminate against a fault at
Burns Creek. Light-grey quartzite outcrops on the bluffs and upward to the top of
the ridge between the Public Works camp and the head of Oregon Gulch, on the nose of
the ridge between Oregon Gulch and Davis Creek, and near the summit of Burns
Mountain.

The rocks along Oregon Gulch and exposed in the Foster Ledge workings are grey
and brown, generally brown weathering, thinly interbedded quartzite and schist layers.
They have a general resemblance to thinly bedded quartzite and schist in and around
the workings on Burns Mountain and along Lightning Creek down-stream from
Houseman Creek.-

Massive, coarse, dark-grey quartzites containing smoky or opalescent quartz
fragments to the size of small rice grains and in beds a few feet to a few tens of feet
thick were observed in many places. Such quartzite outcrops along Lightning Creek
between the old Victoria shaft and Spruce Canyon, along Dry Gulch, at various places
along Chisholm Creek, on the Slough Creek benches, in the divide east of Burns
Mountain, and elsewhere.. These beds are interbedded with varying amounts of more
schistose rocks, such as quartz-sericite schist and grey mica schist. Although the
quartzite in itself is distinctive, no correlation between beds or a succession of beds
was possible.

Coarse grits in places contain beds of quartz pebble conglomerate in which pea-
and grape-sized pebbles are squeezed and drawn out to a length of as much as 2 inches.
Conglomerate is exposed in beds a few tens of feet thick about 200 feet south of Eric
Rask’s hydraulic pit, in Last Chance hydraulic pit, at the north-east corner of Lot-11404
around the Cariboo Ledge workings, near the Cohen Incline, near the south-east corner
of Lot 1666, and near the north-east corner of Lot 10448c. The conglomerate beds are
lenticular and do not persist along strike. No correlation of these coarser beds was
possible. .

Chlorite schists, though distinct in colour, are commonly so soft as to form few
outcrops. Bright-green chlorite schist was observed in a small patch of bedrock
uncovered at the head of the sluice-flume in Dry Gulch ground-sluice pit, and also on
the south side of Lightning Creek in Spruce Canyon immediately below Butcher Bench.
On Anderson Creek brightly coloured chlorite schist immediately overlies limestone in
the old Trelease placer-workings and outcrops across a width of possibly 2,000 feet.
Near its base the chlorite schist is bright green and is interbedded with thin layers and
streaks of grey limestone, but above, the schist becomes darker, weathers to a greenish-
brown, and contains no limestone. Along its projection to the south-east, the band
should cross the upper part of Last Chance and Van Winkle Creeks. No chlorite schist
was observed there, but a number of boulders of similar rock found above the intake
of the lower Grub Gulch ditch indicates that the belt may cross at some point farther
up-stream. Some quartzites in the canyon of Lightning Creek below the mouth of
Houseman Creek, on the west side of Devils Lake Creek north of Leo Bedford’s
hydraulic pit, and in the canyon of Coulter Creek, have a greenish-grey hue resulting
from the development of a small amount of chlorite in the rock. Chloritic schist and
chloritic quartzite near the limestone at the west end of the Ketch pit suggest a

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