Transactions . 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 calle
Transactions . 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 The relationship of ore to rock is evident only in three placesnamely, at the pits marked A, B, C, in Figure IV. The contactfor the remainder of the distance is drift-covered. These pits were excavated by the Canada Copper Company,which held an option on the property some two years ago. Themain pit, marked A, is at the most northerly point of the deposit,but it is unfortunately filled with water. A photograph of thispit is shown in Plate I. Against the wall is roughly five feetof almost solid ore which then grades into mixed ore and basicrock. This mixture continues for about four feet, with lessof the ore and more of the basic rock as constituents, to the edgeof the swamp, and no pure serpentine can be seen here. At PitB, these conditions are duplicated except that very little sinkinghas been done. At Pit C, however, solid ore is very scarce evenagainst the foot-wall, and the mixture of pyrrhotite-serpentinerock, lies close against the andesite. Here at a short distance ?So-rallfd
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