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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