. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. No. I.] GEOGNOSTICAL OBSERVATIONS. 5U to the eastward at an angle of 80°, and contain beds of hornblende rock and slaty quartz rock; the latter resting upon the former, and containing many minute veins and disseminated particles of calc ax. At the Barrel Portage, two miles farther to the eastward, the same rock dipping to the northward at 80°. contains precious garnets. The river here has a majestic appearance, being upwards of a mile wide,
. Narrative of a journey to the shores of the Polar Sea, in the years 1819, 20, 21, and 22 [microform]. Scientific expeditions; Expéditions scientifiques. No. I.] GEOGNOSTICAL OBSERVATIONS. 5U to the eastward at an angle of 80°, and contain beds of hornblende rock and slaty quartz rock; the latter resting upon the former, and containing many minute veins and disseminated particles of calc ax. At the Barrel Portage, two miles farther to the eastward, the same rock dipping to the northward at 80°. contains precious garnets. The river here has a majestic appearance, being upwards of a mile wide, and bounded by rocks two hundred feet high. The current is gentle. At tlie Island Portage, four miles to the eastward of the last mentioned place, the stream is barred across by a ridge of red gneiss containing much felspar. It dips at an angle of 80°, and encloses many kidneys jf flesh-coloured felspar. Eleven and a half miles to the wc .tward, the gneiss contains horn- blende ; and half a mile farther on it approaches to mica slate, and dips at an angle of 45°. Beyond this place the river (;ypands a little, and the rocky eminences have a general round-backed outUne ; but on a near approach they are rugged, and some short conical peaks occur. At the Little Rock and Moun- tain Portages, the strata consisting of mica slate dip at an angle of 60°; and at the Otter Portage, a light-red fine-grained gneiss dips to the northward at an angle of 70°. At the Great Devil Portage, two and a half miles b. W, of the Otter Portage, compact gneiss occurs dipping to the 80°. An ex- pansion of the river above this place, termed the Devil's Lake, is very beauti- ful, containing many rocky islands, covered with spruce and aspen trees. The strata of gneiss in this lake had a direction from east to west, and were near- ly vertical. At the Big Rock Discharge, nine and a half miles west of the Devil's Portage, the strata consist of gneiss. In an island, a little
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Keywords: ., bookcentury1800, booksubjectscientificexpeditions, bookyear1823
