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Published online by Cambridge University Press: 01 May 2009
In the Val d'Anniviers or Einfisch-thal, which joins the Rhone valley at Sierre, the stoves used in warming the houses are often constructed from a stone obtained in the valley. This is so soft that it can be readily cut into shape, but it resists heat remarkably well. According to Gerlach, it is obtained at two or three places, but the only one which I have examined is a quarry some height up on the left bank of the valley, rather above Zinal, to which I was conducted by my friend Mr. J. Eccles, who had noticed it during a former visit to this part of the Alps. It is a short distance from the path to the Arpitetta Alp, a favourite excursion for tourists. The result of our examination seems to be of sufficient interest to justify a brief notice.
page 110 note 1 Beitr. zur Geolog. Karte der Schweiz, Lief, ix, pp. 130–1, 142, 173Google Scholar; e.g. near Evolena, L'Allée, and the Moiry Glacier (in another branch of the Val d'Anniviers).
page 110 note 2 Gerlach, , loc. cit. and Lief, xxvii, pp. 87–90Google Scholar, mentions the connection of this “topfstein” with serpentine, grüner schiefer, and grauer schiefer (the calc-micaschist), but, if I rightly understand him, is not clear as to its origin, or even that of the serpentine.
page 111 note 1 Quart. Journ. Geol. Soc., vol. L (1894), p. 283.Google Scholar
page 112 note 1 Cf. description of serpentine from the Gornergrat, Quart. Journ. Geol. Soc., vol. lii (1896), p. 452.Google Scholar
page 112 note 2 It may be an optical anomaly due to strain, or, as suggested by Eosenbusch, to an admixture with actinolite, almost identical in general aspect. I obtain the results in both slices.
page 112 note 3 Quart. Journ. Geol. Soc., vol. xxxvii (1881), pp. 44–5.Google Scholar
page 113 note 1 At Ayer, a hamlet about an hour's walk down the valley, are old nickel-mines, but as I did not anticipate this mineral turning up here, I did not visit them.
page 113 note 2 Named from Noumea, capital of New Caledonia; described by Professor Liversidge, , Proc. Roy. Soc. N.S.W. 1875, p. 75Google Scholar; Journal, 1881, p. 227.Google Scholar
page 113 note 3 This part is not unlike chrysocolla, but the colour is rather brighter.
page 113 note 4 Ed. 1892.
page 113 note 5 Proc. Roy. Soc. N.S.W., ut suprà
page 114 note 1 See also Croix, La, “Mineralogie de la France et ses Colonies,” vol. i, p. 438. He speaks of noumeite as either crypto-crystalline or amorphous.Google Scholar
page 114 note 2 To speak only of the nickel-oxide, that varies generally from 22·0 to just over 45·0; but in one case 14·6, in another 10·2, and in a third only 2·32. Münster, C. A., quoted in Min. Mag., vol. x, p. 39Google Scholar, says that he has found nickel-oxide replacing magnesia in olivine, serpentine, steatite, etc. Professor Liversidge suggests that the formula of noumeite may be 2 Mg O 3 Si O2 2 H2 O, where some of the magnesium is replaced by nickel.
page 114 note 3 I am indebted for notes and specimens of this mass to my friend, Mr. J. Eccles, F.G.S., but I had a remarkably good view of it at a distance of about half a mile, during the ascent of a neighbouring peak. As I know him to be one of the most accurate of observers, and the glen leading to the base of the Crête is very stony and uninteresting, I absolved myself from undertaking a tiresome walk.
page 114 note 4 By various authors, myself included.
page 115 note 1 Some of it shows strain phenomena, indicating the action of a pressure subsequent to that which has produced the general structure of the rock.
page 115 note 2 Loc. cit., p. 452.
page 115 note 3 This is the mineral which in some earlier papers I suggested might be a variety of kyanite. It is a frequent constituent of these green-schists.
page 115 note 4 In these rocks, as I have already described, the green mineral is sometimes a prismatic or acicular hornblende, sometimes chlorite, and both minerals may be present. The “chlorite schist” of tlie Start and Bolt Head district in South Devon is a rock of similar character to these Alpine green-schists.