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I.—On Marekanite and its Allies

Published online by Cambridge University Press:  01 May 2009

John W. Judd
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Extract

In almost every collection of minerals there may be found specimens of the curious little glassy balls, which, from the locality of their occurrence—the great Marekanka, near Okhotsk in Siberia—have received the name of Marekanile. These glassy balls are more or less perfectly rounded in form, they vary in their colour, through different shades of smoke-grey to orange-brown, while in size they range from the dimensions of a pea to those of a walnut. Most mineralogical treatises still continue to recognize Marekanite as a mineral, and class it either as a variety of Obsidian or of Pearlstone.

While totally disallowing the claim of Marekanite to rank as a mineral-species or even variety—the petrographer recognizes in this substance a type of rock, which proves to be by no means devoid of interest, when its properties are carefully studied, nor destitute of suggestiveness, when its mode of occurrence is thoughtfully considered.

Type
Original Articles
Information
Geological Magazine , Volume 3 , Issue 6 , June 1886 , pp. 241 - 248
Copyright
Copyright © Cambridge University Press 1886

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References

page 241 note 1 Nova Acta Acad. Petropol. T. xii. (1801) p. 237.Google Scholar

page 241 note 2 Neue Nord Beitrag, vol. ii. p. 299.Google Scholar

page 242 note 1 Berlin Abhandl. Physikal Klasse (1812—1813), pp. 49—58.Google Scholar

page 242 note 2 Archiv. f. d. Wissensch. Kunde Yon Eussl. iii. (1843), p. 175.Google Scholar

page 242 note 3 Zeitschr. d. d. Geolog. Ges. xv. (1863), p. 459.Google Scholar

page 242 note 4 “Elemente der Lithologie” (1886), p. 80.Google Scholar

page 244 note 1 Mikroskop. Beschaff. der Mineralien uud Gesteine (1873), p. 351.Google Scholar

page 244 note 2 See Wichmann, , Zeitsch. d. d. Geol. Ges. xxxv. p. 849;Google ScholarDiller, Amer. Journ. Sc. xxviii. p. 252;Google ScholarRutley, , Quart. Journ. Geol. Soc. vol. xli. (1885), p. 152.CrossRefGoogle Scholar

page 244 note 3 Compare Zirkel, Mikroskop. Beschaff. der Mineralien und Gesteine (1873), p. 361.Google Scholar

page 244 note 4 Erman, Archir. f. d. Wissensch. Kunde Kusslands, iii. (1843), p. 175;Google ScholarHerter, , Zeitsch. d. d. Geol. Ges. xv. (1863), p. 459.Google Scholar

page 244 note 5 See Geol. Mag. Dec. II. Vol. II. pp. 68 and 69, Fig. 9.Google Scholar

page 245 note 1 Comptes rendus, vol. xviii. (1844), p. 46.Google Scholar

page 245 note 2 Trans. Geol. Soc. 2nd ser. vol. ii. p. 205, plate 24.Google Scholar See also Volcanoes, 2nd ed. p. 105.

page 246 note 1 Geol. Mag. Dee. II, Vol. II. (1875), p. 308.Google Scholar

page 246 note 2 See Phil. Mag. ser. 5, vol. viii. p. 25.Google Scholar

page 247 note 1 Quart. Journ. Geol. Soo. vol. xli. (1884), p. 340.Google Scholar

page 247 note 2 Geol. Mag. Bee. III. Vol. II. (1885), p. 91.Google Scholar

page 247 note 3 Mineralogie Micrographique (1879), pl. xix. fig. 2.Google Scholar

page 247 note 4 Geol. Mag. Dec. II. Vol. VII. p. 115.Google Scholar