Annual report . hegranite at the same locality are of a soda rhyolite gneiss which contains quartz,albite and biotite with small amounts of iron oxide. The reddish granitoid gneissalong the shore of South Cove in Avhich these inclusions and dikes occur, is a 164 Department of Mines No. 4 biotite granite gneiss which in general is composed of orthoclase, microcline, quartz,biotitc, hornblende and micropegmatite, the last two in small amounts. It isreddish in colour toward the south end of the Cove^ but becomes somewhat greyeras Hungry narrows is approached. At this point it is succeeded by a fi
Annual report . hegranite at the same locality are of a soda rhyolite gneiss which contains quartz,albite and biotite with small amounts of iron oxide. The reddish granitoid gneissalong the shore of South Cove in Avhich these inclusions and dikes occur, is a 164 Department of Mines No. 4 biotite granite gneiss which in general is composed of orthoclase, microcline, quartz,biotitc, hornblende and micropegmatite, the last two in small amounts. It isreddish in colour toward the south end of the Cove^ but becomes somewhat greyeras Hungry narrows is approached. At this point it is succeeded by a fine-grained,almost felsitic soda-rhyolite gneiss which is markedly stratiform in appearance,and is identical with the inclusions found in the biotite gneiss to the south. Therhyolite is therefore older than the batholithic intrusion which occupies the countryfrom Freda to Lac Seul. It strikes in general east and west, varying somewhatto the north and south of 90°, and dips vertically or steeply toward the Banded rock near Hungry narrows, Lac Seul. It is exposed from Hungry narrows northward on the islands in Island bay, atShanty narrows, on the point lying between Island bay and the northwestern armof Lac Seul, and on the islands in the lake to the northwest of Shanty line ends for the present on the north shore of the lake, where no outcrop ofrock exists. The rhyolite is penetrated by granite dikes or sills generally parallel tothe structure of the rhyolite and in some places in large bodies—especially on thesouth shore of the bay northwest of Hungry narrows near its mouth, and on anisland near the north side of Island bay, just to the south of Shanty narrows. 1920 A Geolog:ical Reconnaissance into Patricia 165 On the shore between Hungry narrows and the entrance to the unnamed inletto the northwest there is a series of rocks exposed which is finer grained thanthe rhyolite, being quite aphanitic, and showing a ribbon-like banding parallelto the strike. It
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
