Transactions . y to the south ofthis. Concessions I, II, III, Lots 1, 2, 3 Dundonald, and part of Clergue, contain the main body of the rock men-tioned. This small area has slightly more relief than the sur-rounding districts, and the rock exposures occasionally rise in ashcitT wall to a height of nearly one hundred feet. Figure II showsin a general way the surface geology of the district. Occurrence of the Ore Generally. The ore-body, so far as ascertainable by surface inspection,is of small extent. It occurs on the north-west side of an exposure The Alexo Mine—Uglow 659 of andesit
Transactions . y to the south ofthis. Concessions I, II, III, Lots 1, 2, 3 Dundonald, and part of Clergue, contain the main body of the rock men-tioned. This small area has slightly more relief than the sur-rounding districts, and the rock exposures occasionally rise in ashcitT wall to a height of nearly one hundred feet. Figure II showsin a general way the surface geology of the district. Occurrence of the Ore Generally. The ore-body, so far as ascertainable by surface inspection,is of small extent. It occurs on the north-west side of an exposure The Alexo Mine—Uglow 659 of andesite * measuring about 700 feet by 900 feet. Thisrock rises on its north and west sides rather steeply to a heightof about one hundred feet out of a flat swampy country, butslopes away somewhat gradually to the south and east becomingmore and more drift-covered. The vertical cross-section (Fig. Ill)from the north-west to the south-east shows well the position ofthe deposit. I Diabosc Phijolite Like 2^ Serpentina. Fia. II. The steep face of andesite descends some seventy-five feetor 80 to a terracf which, at the foot of the cliff, is still about twentyfeet above the level of the swamp. This terrace ia largely drift-covered, but shows here and there exposurea of andenite. Itextends about twenty or thirty feet north-we«t from the foot of ? SoK»llcd by Dr. A. P. Colcnuui, The Alcxo Nickel Depodt, , Vol., No. 4, p. 373. 660 The Alexo Mine—Uglow the cliff. At this point, the rock presents a regular face slopingat about 60° into the ground. Against this face or wall, a basicrock called sei-pentine * is found. Only about ten or fifteenfeet of this are apparent, the rest of the mass being hidden beneathswampy drift. The ore is found, as indicated in the sketch, alongthe contact of the serpentine and andesite.
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Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1895
