. 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.] f;EO(;NOSTICAL OBSERVATIONS. 523 hornblcndic gnoiss, which is traversed by a vein of very coarse granite several yards wide. The upper part of the hill consists of strata of horn- blendic gneiss, dipping N. b. W. at an angle of 45°. About thirty miles due north of Dog-Rib Rock, an irregular ridge of hills of coarse Hand and gravel occurs. The intermediate district is a continuation of the gneiss formation, without any material alte
. 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.] f;EO(;NOSTICAL OBSERVATIONS. 523 hornblcndic gnoiss, which is traversed by a vein of very coarse granite several yards wide. The upper part of the hill consists of strata of horn- blendic gneiss, dipping N. b. W. at an angle of 45°. About thirty miles due north of Dog-Rib Rock, an irregular ridge of hills of coarse Hand and gravel occurs. The intermediate district is a continuation of the gneiss formation, without any material alteration in iipix;arance, and beds of gneiss or granite occasionally shew themselves at the foot of the ridge. These sand hills constitute a .small height of land between the source of Winter River and a dilatation of the Copper-Mine River, named Point Lake. The gneiss appears in abundance on the north side of this height, associated with much mica slate and some clay slate. The hills are higher here, and the valleys narrower and deeper, than in the neighbourhood of Fort Enterprise. On an arm of Point Lake, about forty-five milee due north of Fort Enter- prise, the rocks belong to the transition class. The hills here are six or seven hundred feet high, and are in their general character rather round- backed, but obtuse conical elevations and high and steep cliffs are very numerous. At the encampment in lat. 05° 13' N., from whence we started on June â¢25th, the following strata occur, dipping to the westward at an angle of 80°, but much waved and convoluted:âGreywacke passing into Greywacke slateâ Greywacke with small imbedded crystals of hornblendeâdark greenish or blackish grey transition clay slate, having a thick slaty structure. Several flat islands in the lake consist of transition green stone. A rock standing apart from the neighbouring hills on the borders of the lake, about a mile and a half to the southward of the encampment, having a rounded summit, but
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Keywords: ., bookcentury1800, booksubjectscientificexpeditions, bookyear1823
