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Tinguaites from EIfdalen and Ruphachthal: Basalts from Madagascar and the Soudan

Published online by Cambridge University Press:  14 March 2018

G. T. Prior*
Affiliation:
Mineral Department of the British Museum

Extract

In connection with the investigation of ægirine-anorthoclase rocks from Abyssinia, belonging to the grorudite-tingusite series, an examination was made of specimens of the so-called green phonolite from Elfdalen, which in the British Museum collection accompanied the more ordinary brown and red porphyry from that locality. In the descriptions of the well-known porphyry quarries of Elfdalen, mention is made of this green variety as occurring only in boulders. Törnebohm was the first to record the occurrence of these rocks in situ, and to describe their characters, They were found in the form of dykes in the neighbourhood of Heden, near Särna, Dalarne, Sweden, and were interesting as containing cancrinite in clear, well-defined porphyritic crystals as undoubtedly a primary constituent.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1901

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References

Page 86 note 1 Min. Mag. 1900, XII, 255-78.

Page 86 note 2 Vetensk, Hjelm K.. Akad. Nya Handl. 1805, pp. 106-8Google Scholar.

Page 86 note 3 Geol. För. Förh. 1883, VI, 888, and Abst. in Neues Jahrb. f. Min. &c. 1883, (ii),—370.

Page 87 note 1 Brögger. Eruptivgesteine des Kristianiagebietes, 1894, I, 173.

Page 87 note 2 Trans. New York Acad. sci. 1892, XI, 60.

Page 88 note 1 See Brögger. Eruptivgesteine des Kristianisgebietes, 1894, I, 176.

Page 88 note 2 Sehauf, W., Unters. nassauische Diabase. Inaug.-Diss. Bonn, 1880, p. 17 Google Scholar.

Page 88 note 3 Zeits. Deutseh. geol. Ges. 1883, XXXV, 216.

Page 88 note 4 Min. Mag. 1900, XII, 268.

Page 89 note 1 XVI Ann. Rep. U. S. Geol. Survey, 1894-5, Part II, p. 35.