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V.—Metalliferous Deposits
Published online by Cambridge University Press: 01 May 2009
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The origin of metalliferous deposits has long been a subject of discussion. Professor Joseph Le Conte, however, seems to have arrived at a very decided opinion on this question, for in a contribution to the “American Journal of Science” (3rd series, xxvi. p. 1—19, July, 1883), after referring to Sulphur Banks and Steamboat Springs in California, he says: “Thus then subterranean waters of any kind, but especially alkaline, at any temperature, but mostly hot, circulating in any direction, but mainly upcoming, and in any kind of waterway, but mainly in open fissures, by deposit, form metalliferous veins.”
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References
page 310 note 1 The scale at the base of the outer antenna in Eryon Barrovensis, M'Coy, is figured by DrWoodward, H. (see Quart. Journ. Geol. Soc. 1866, vol. xxii. pi. xxv.Google Scholar fig. 1) from specimens in the British Museum and the collection of the Rev. P. B. Brodie, F.G.S. Dr. Woodward writes;—“Each of the outer antennæ has a large oval scale attached to its broad basal joint” (op. cit. p. 496).—Edit.
page 310 note 2 Whatever decision may ultimately be arrived at, as to the advisability, or otherwise, of abolishing the genus Eryon, and adopting Mr. C. Spence-Bate's proposed genus Archæstacus, for these Liassic Crustaceans, there is little doubt that the specimen here described as A. Willemæsii is the same as Eryon crassichelis, Woodw, H.., 1866, Quart. Journ. Geol. Soc. vol. xxii. p. 497Google Scholar, a reduced figure of which only was given on pl. xxv. fig. 2 (op. cit.), in which the characters are not well shown. Capt. Hussey's specimen figured as E. crassichelis is moreover preserved with the underside exposed, whereas Mr. J. E. Lee's specimen exhibits the dorsal aspect. The detached carapace of E. crassichelis, from Mr. Day's Collection (see op. cit.), now in the British Museum, appears, however, identical with Mr. Lee's specimen. In Mr. Day's specimen the eye can also be detected.—Edit.
page 310 note 3 Zeitschrift der Deutschen geologischen Gesellschaft, 1881, 507—511; 1882, 288—372.
page 311 note 1 Carl Ochsenius, “Die Bildung der Steinsalzlager und ihrer Mutterlaugensalze,” Halle, 1877, and Nova Acta, 1878.
page 315 note 1 Ochsenius, Petroleum-Bildung, Natur, No. 29, 1882, Halle.
page 316 note 1 There is no evidence to be derived from Palæobotany in support of this theory; on the contrary, there is abundant evidence to prove that Cryptogamic Land-Plants built up the Coal-measures.—Edit.
page 317 note 1 Zeitschrift, etc., vol. xxxiv. p. 519.Google Scholar